/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:38:34,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:38:34,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:38:34,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:38:34,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:38:34,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:38:34,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:38:34,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:38:34,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:38:34,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:38:34,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:38:34,969 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:38:34,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:38:34,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:38:34,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:38:34,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:38:34,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:38:34,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:38:34,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:38:34,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:38:34,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:38:34,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:38:34,973 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:38:34,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:38:34,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:38:35,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:38:35,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:38:35,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:38:35,231 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:38:35,232 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:38:35,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2021-07-13 19:38:35,233 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2021-07-13 19:38:35,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:38:35,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:38:35,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:38:35,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:38:35,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:38:35,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:38:35,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:38:35,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:38:35,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:38:35,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... [2021-07-13 19:38:35,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:38:35,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:38:35,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:38:35,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:38:35,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:38:35,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:38:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:38:35,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:38:35,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:38:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:38:35,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:38:35,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:38:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:38:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:38:35,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:38:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:38:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:38:35,430 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:38:35,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:38:35,779 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-13 19:38:35,780 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:38:35 BoogieIcfgContainer [2021-07-13 19:38:35,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:38:35,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:38:35,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:38:35,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:38:35,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:35" (1/2) ... [2021-07-13 19:38:35,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b1d5da and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:38:35, skipping insertion in model container [2021-07-13 19:38:35,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:38:35" (2/2) ... [2021-07-13 19:38:35,784 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-07-13 19:38:35,788 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:38:35,788 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:38:35,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:38:35,788 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:38:35,834 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:38:35,852 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:38:35,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:38:35,865 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:38:35,865 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:38:35,865 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:38:35,865 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:38:35,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:38:35,865 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:38:35,865 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:38:35,871 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-07-13 19:38:35,893 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:35,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,903 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-07-13 19:38:35,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551847235] [2021-07-13 19:38:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551847235] [2021-07-13 19:38:36,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551847235] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:38:36,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785908535] [2021-07-13 19:38:36,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:38:36,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:38:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:38:36,115 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,165 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-07-13 19:38:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:38:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,177 INFO L225 Difference]: With dead ends: 192 [2021-07-13 19:38:36,177 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:38:36,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:38:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-07-13 19:38:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-07-13 19:38:36,228 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-07-13 19:38:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,228 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-07-13 19:38:36,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-07-13 19:38:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,231 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:38:36,231 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1970777821, now seen corresponding path program 1 times [2021-07-13 19:38:36,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771612995] [2021-07-13 19:38:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771612995] [2021-07-13 19:38:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771612995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688683851] [2021-07-13 19:38:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688683851] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:36,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-07-13 19:38:36,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197024138] [2021-07-13 19:38:36,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:36,596 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,723 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-07-13 19:38:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,727 INFO L225 Difference]: With dead ends: 202 [2021-07-13 19:38:36,727 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:38:36,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:38:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-07-13 19:38:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.8742138364779874) internal successors, (457), 159 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-07-13 19:38:36,747 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-07-13 19:38:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,748 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-07-13 19:38:36,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-07-13 19:38:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,753 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:38:36,972 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash -92460565, now seen corresponding path program 2 times [2021-07-13 19:38:36,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177118195] [2021-07-13 19:38:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177118195] [2021-07-13 19:38:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177118195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551846820] [2021-07-13 19:38:37,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-07-13 19:38:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:38:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:37,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551846820] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:37,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-07-13 19:38:37,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838303925] [2021-07-13 19:38:37,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:38:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:38:37,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:37,163 INFO L87 Difference]: Start difference. First operand 160 states and 457 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,217 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-07-13 19:38:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:38:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,219 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:38:37,219 INFO L226 Difference]: Without dead ends: 165 [2021-07-13 19:38:37,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-13 19:38:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-07-13 19:38:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-07-13 19:38:37,255 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-07-13 19:38:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,256 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-07-13 19:38:37,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-07-13 19:38:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:37,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,257 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,473 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1791011915, now seen corresponding path program 1 times [2021-07-13 19:38:37,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021873578] [2021-07-13 19:38:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021873578] [2021-07-13 19:38:37,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021873578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697925631] [2021-07-13 19:38:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:37,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:37,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:37,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:37,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:37,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:37,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:37,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:37,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:37,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:37,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-13 19:38:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697925631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:38,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:38,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:38:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573643693] [2021-07-13 19:38:38,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:38,077 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,874 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-07-13 19:38:39,301 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-13 19:38:39,438 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-07-13 19:38:39,635 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-13 19:38:39,851 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-13 19:38:40,110 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-07-13 19:38:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,147 INFO L93 Difference]: Finished difference Result 482 states and 1415 transitions. [2021-07-13 19:38:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,150 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:38:40,150 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:38:40,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1879.5ms TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:38:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 204. [2021-07-13 19:38:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9655172413793105) internal successors, (602), 203 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2021-07-13 19:38:40,157 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2021-07-13 19:38:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,157 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2021-07-13 19:38:40,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2021-07-13 19:38:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:40,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,158 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,373 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-07-13 19:38:40,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420965881] [2021-07-13 19:38:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420965881] [2021-07-13 19:38:40,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420965881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604187856] [2021-07-13 19:38:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:40,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:40,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:38:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:40,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:40,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:40,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:40,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:40,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,682 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-07-13 19:38:40,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:40,683 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-07-13 19:38:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604187856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:40,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:40,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851595514] [2021-07-13 19:38:40,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:40,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:40,753 INFO L87 Difference]: Start difference. First operand 204 states and 602 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,287 INFO L93 Difference]: Finished difference Result 366 states and 1056 transitions. [2021-07-13 19:38:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,289 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:38:41,289 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:38:41,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:38:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 219. [2021-07-13 19:38:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.0137614678899083) internal successors, (657), 218 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 657 transitions. [2021-07-13 19:38:41,294 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 657 transitions. Word has length 19 [2021-07-13 19:38:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,294 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 657 transitions. [2021-07-13 19:38:41,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 657 transitions. [2021-07-13 19:38:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:41,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,295 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,513 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-07-13 19:38:41,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459570725] [2021-07-13 19:38:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459570725] [2021-07-13 19:38:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459570725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913588792] [2021-07-13 19:38:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:41,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:38:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:41,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:41,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:41,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:41,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:41,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:41,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:41,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:41,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:41,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:41,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:41,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:41,853 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,940 INFO L628 ElimStorePlain]: treesize reduction 100, result has 51.7 percent of original size [2021-07-13 19:38:41,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:38:41,942 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:389, output treesize:107 [2021-07-13 19:38:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913588792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:42,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022019630] [2021-07-13 19:38:42,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:42,126 INFO L87 Difference]: Start difference. First operand 219 states and 657 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,391 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:38:42,536 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 19:38:42,662 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-07-13 19:38:42,846 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 19:38:42,978 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:38:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,056 INFO L93 Difference]: Finished difference Result 477 states and 1330 transitions. [2021-07-13 19:38:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,058 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:38:43,058 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:38:43,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 870.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:38:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 224. [2021-07-13 19:38:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.0582959641255605) internal successors, (682), 223 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 682 transitions. [2021-07-13 19:38:43,064 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 682 transitions. Word has length 19 [2021-07-13 19:38:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,064 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 682 transitions. [2021-07-13 19:38:43,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 682 transitions. [2021-07-13 19:38:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:43,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,065 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:38:43,281 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-07-13 19:38:43,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700642029] [2021-07-13 19:38:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700642029] [2021-07-13 19:38:43,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700642029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104750963] [2021-07-13 19:38:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:43,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:38:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:43,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:43,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:43,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:43,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:43,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:43,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:43,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:43,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:43,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,644 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-07-13 19:38:43,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:43,645 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:257, output treesize:79 [2021-07-13 19:38:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104750963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:43,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:38:43,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530118533] [2021-07-13 19:38:43,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:43,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:43,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:43,821 INFO L87 Difference]: Start difference. First operand 224 states and 682 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,215 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 19:38:44,506 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 19:38:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,615 INFO L93 Difference]: Finished difference Result 454 states and 1282 transitions. [2021-07-13 19:38:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,617 INFO L225 Difference]: With dead ends: 454 [2021-07-13 19:38:44,617 INFO L226 Difference]: Without dead ends: 421 [2021-07-13 19:38:44,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-13 19:38:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 229. [2021-07-13 19:38:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.0789473684210527) internal successors, (702), 228 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 702 transitions. [2021-07-13 19:38:44,624 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 702 transitions. Word has length 19 [2021-07-13 19:38:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,624 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 702 transitions. [2021-07-13 19:38:44,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 702 transitions. [2021-07-13 19:38:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:44,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:44,841 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-07-13 19:38:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783359056] [2021-07-13 19:38:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783359056] [2021-07-13 19:38:44,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783359056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:44,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355851010] [2021-07-13 19:38:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:44,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:38:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:45,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:45,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:45,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:45,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:45,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,135 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-07-13 19:38:45,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:45,136 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-07-13 19:38:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355851010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:45,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:38:45,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739793015] [2021-07-13 19:38:45,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:45,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:45,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:45,212 INFO L87 Difference]: Start difference. First operand 229 states and 702 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,493 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:38:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,957 INFO L93 Difference]: Finished difference Result 471 states and 1333 transitions. [2021-07-13 19:38:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,959 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:38:45,959 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:38:45,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:38:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 249. [2021-07-13 19:38:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.092741935483871) internal successors, (767), 248 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 767 transitions. [2021-07-13 19:38:45,965 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 767 transitions. Word has length 19 [2021-07-13 19:38:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,965 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 767 transitions. [2021-07-13 19:38:45,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 767 transitions. [2021-07-13 19:38:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:45,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,966 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:46,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,166 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-07-13 19:38:46,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:46,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468612829] [2021-07-13 19:38:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:46,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468612829] [2021-07-13 19:38:46,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468612829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576865487] [2021-07-13 19:38:46,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:46,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:38:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:46,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:46,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:46,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:46,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:46,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:46,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:46,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:46,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,538 INFO L628 ElimStorePlain]: treesize reduction 32, result has 54.3 percent of original size [2021-07-13 19:38:46,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:46,539 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-07-13 19:38:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576865487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:46,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:38:46,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969428579] [2021-07-13 19:38:46,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:46,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:46,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:46,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:46,618 INFO L87 Difference]: Start difference. First operand 249 states and 767 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:47,072 INFO L93 Difference]: Finished difference Result 349 states and 1061 transitions. [2021-07-13 19:38:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:47,074 INFO L225 Difference]: With dead ends: 349 [2021-07-13 19:38:47,074 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:38:47,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:38:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:38:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2021-07-13 19:38:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.110671936758893) internal successors, (787), 253 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 787 transitions. [2021-07-13 19:38:47,080 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 787 transitions. Word has length 19 [2021-07-13 19:38:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:47,080 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 787 transitions. [2021-07-13 19:38:47,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 787 transitions. [2021-07-13 19:38:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:47,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:47,080 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:47,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-13 19:38:47,281 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-07-13 19:38:47,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:47,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816425162] [2021-07-13 19:38:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:47,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816425162] [2021-07-13 19:38:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816425162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113878545] [2021-07-13 19:38:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:47,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:47,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:47,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:47,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:47,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:47,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:47,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:47,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:47,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:47,567 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:47,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:47,584 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:47,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,640 INFO L628 ElimStorePlain]: treesize reduction 48, result has 59.3 percent of original size [2021-07-13 19:38:47,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:47,641 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:409, output treesize:70 [2021-07-13 19:38:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113878545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:47,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:38:47,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58180505] [2021-07-13 19:38:47,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:47,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:47,838 INFO L87 Difference]: Start difference. First operand 254 states and 787 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:48,930 INFO L93 Difference]: Finished difference Result 515 states and 1500 transitions. [2021-07-13 19:38:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:38:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:48,932 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:38:48,932 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:38:48,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1038.7ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:38:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 269. [2021-07-13 19:38:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.1977611940298507) internal successors, (857), 268 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 857 transitions. [2021-07-13 19:38:48,939 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 857 transitions. Word has length 19 [2021-07-13 19:38:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:48,939 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 857 transitions. [2021-07-13 19:38:48,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 857 transitions. [2021-07-13 19:38:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:48,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:48,940 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:49,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,157 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-07-13 19:38:49,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:49,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019883928] [2021-07-13 19:38:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019883928] [2021-07-13 19:38:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019883928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295166358] [2021-07-13 19:38:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:49,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:49,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:49,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:49,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:49,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:49,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:49,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:49,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:49,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:49,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:49,449 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:49,453 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:49,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,535 INFO L628 ElimStorePlain]: treesize reduction 110, result has 42.1 percent of original size [2021-07-13 19:38:49,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:49,536 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:386, output treesize:80 [2021-07-13 19:38:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295166358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:49,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-07-13 19:38:49,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788738040] [2021-07-13 19:38:49,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:49,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:49,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:49,775 INFO L87 Difference]: Start difference. First operand 269 states and 857 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,070 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-07-13 19:38:50,309 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-13 19:38:50,587 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 19:38:50,765 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-07-13 19:38:50,959 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-13 19:38:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:50,966 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2021-07-13 19:38:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:50,970 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:38:50,970 INFO L226 Difference]: Without dead ends: 452 [2021-07-13 19:38:50,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-13 19:38:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 274. [2021-07-13 19:38:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.2124542124542126) internal successors, (877), 273 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 877 transitions. [2021-07-13 19:38:50,980 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 877 transitions. Word has length 19 [2021-07-13 19:38:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:50,980 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 877 transitions. [2021-07-13 19:38:50,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 877 transitions. [2021-07-13 19:38:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:50,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:50,981 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:51,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:51,197 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash -709814267, now seen corresponding path program 9 times [2021-07-13 19:38:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:51,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324728325] [2021-07-13 19:38:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324728325] [2021-07-13 19:38:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324728325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585037706] [2021-07-13 19:38:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:51,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:51,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:51,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:51,482 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,485 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,534 INFO L628 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2021-07-13 19:38:51,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:51,535 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:382, output treesize:58 [2021-07-13 19:38:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585037706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:51,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-07-13 19:38:51,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123696265] [2021-07-13 19:38:51,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:51,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:51,696 INFO L87 Difference]: Start difference. First operand 274 states and 877 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:52,553 INFO L93 Difference]: Finished difference Result 434 states and 1279 transitions. [2021-07-13 19:38:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:38:52,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:52,556 INFO L225 Difference]: With dead ends: 434 [2021-07-13 19:38:52,556 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:38:52,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 754.6ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:38:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2021-07-13 19:38:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1941391941391943) internal successors, (872), 273 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 872 transitions. [2021-07-13 19:38:52,564 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 872 transitions. Word has length 19 [2021-07-13 19:38:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:52,564 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 872 transitions. [2021-07-13 19:38:52,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 872 transitions. [2021-07-13 19:38:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:52,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:52,567 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:52,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:52,778 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-07-13 19:38:52,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:52,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871002921] [2021-07-13 19:38:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871002921] [2021-07-13 19:38:52,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871002921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452639593] [2021-07-13 19:38:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:52,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:53,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:53,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:53,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:53,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:53,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:53,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:53,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:53,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:53,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:53,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:53,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:53,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,165 INFO L628 ElimStorePlain]: treesize reduction 100, result has 44.1 percent of original size [2021-07-13 19:38:53,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:53,166 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-07-13 19:38:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:53,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452639593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:53,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:53,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:38:53,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739452026] [2021-07-13 19:38:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:53,469 INFO L87 Difference]: Start difference. First operand 274 states and 872 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,830 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 19:38:54,115 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 19:38:54,412 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 19:38:54,585 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-13 19:38:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,634 INFO L93 Difference]: Finished difference Result 634 states and 1845 transitions. [2021-07-13 19:38:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,637 INFO L225 Difference]: With dead ends: 634 [2021-07-13 19:38:54,637 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:38:54,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1207.8ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:38:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 284. [2021-07-13 19:38:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.222614840989399) internal successors, (912), 283 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 912 transitions. [2021-07-13 19:38:54,644 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 912 transitions. Word has length 19 [2021-07-13 19:38:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,645 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 912 transitions. [2021-07-13 19:38:54,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 912 transitions. [2021-07-13 19:38:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:54,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:54,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,861 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-07-13 19:38:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902577116] [2021-07-13 19:38:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902577116] [2021-07-13 19:38:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902577116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629428043] [2021-07-13 19:38:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:38:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:55,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:55,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:55,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:55,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:55,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:55,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,188 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-13 19:38:55,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:55,189 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:133, output treesize:49 [2021-07-13 19:38:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629428043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:55,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:38:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702690655] [2021-07-13 19:38:55,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:55,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:55,279 INFO L87 Difference]: Start difference. First operand 284 states and 912 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:55,685 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-13 19:38:55,931 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 19:38:56,166 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 19:38:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:56,222 INFO L93 Difference]: Finished difference Result 612 states and 1763 transitions. [2021-07-13 19:38:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:56,225 INFO L225 Difference]: With dead ends: 612 [2021-07-13 19:38:56,225 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:38:56,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:38:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 294. [2021-07-13 19:38:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.249146757679181) internal successors, (952), 293 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 952 transitions. [2021-07-13 19:38:56,232 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 952 transitions. Word has length 19 [2021-07-13 19:38:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:56,232 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 952 transitions. [2021-07-13 19:38:56,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 952 transitions. [2021-07-13 19:38:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:56,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:56,233 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:56,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 19:38:56,450 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-07-13 19:38:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:56,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486833556] [2021-07-13 19:38:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486833556] [2021-07-13 19:38:56,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486833556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552449434] [2021-07-13 19:38:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:56,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:56,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:56,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:56,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:56,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:56,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:56,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:56,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,734 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-07-13 19:38:56,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:56,735 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-07-13 19:38:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552449434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:56,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:38:56,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117022701] [2021-07-13 19:38:56,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:56,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:56,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:56,899 INFO L87 Difference]: Start difference. First operand 294 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:58,054 INFO L93 Difference]: Finished difference Result 533 states and 1561 transitions. [2021-07-13 19:38:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:38:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:58,056 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:38:58,056 INFO L226 Difference]: Without dead ends: 405 [2021-07-13 19:38:58,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:38:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-13 19:38:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2021-07-13 19:38:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.2320819112627985) internal successors, (947), 293 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 947 transitions. [2021-07-13 19:38:58,065 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 947 transitions. Word has length 19 [2021-07-13 19:38:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:58,065 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 947 transitions. [2021-07-13 19:38:58,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 947 transitions. [2021-07-13 19:38:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:58,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:58,066 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:58,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:58,281 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1346948354, now seen corresponding path program 13 times [2021-07-13 19:38:58,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:58,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382033921] [2021-07-13 19:38:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382033921] [2021-07-13 19:38:58,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382033921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13268411] [2021-07-13 19:38:58,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:38:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:58,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:58,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,466 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:38:58,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:58,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:38:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13268411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:58,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:38:58,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411482826] [2021-07-13 19:38:58,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:58,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:58,516 INFO L87 Difference]: Start difference. First operand 294 states and 947 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:58,795 INFO L93 Difference]: Finished difference Result 486 states and 1487 transitions. [2021-07-13 19:38:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:38:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:58,797 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:38:58,797 INFO L226 Difference]: Without dead ends: 434 [2021-07-13 19:38:58,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-13 19:38:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 283. [2021-07-13 19:38:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.2872340425531914) internal successors, (927), 282 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 927 transitions. [2021-07-13 19:38:58,803 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 927 transitions. Word has length 20 [2021-07-13 19:38:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:58,803 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 927 transitions. [2021-07-13 19:38:58,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 927 transitions. [2021-07-13 19:38:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:58,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:58,804 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:59,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:38:59,017 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash 513236125, now seen corresponding path program 14 times [2021-07-13 19:38:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:59,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826573122] [2021-07-13 19:38:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826573122] [2021-07-13 19:38:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826573122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331588827] [2021-07-13 19:38:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:59,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:38:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:59,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:59,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:59,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,235 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:38:59,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:59,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-13 19:38:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331588827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:59,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:38:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083822196] [2021-07-13 19:38:59,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:59,250 INFO L87 Difference]: Start difference. First operand 283 states and 927 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:59,509 INFO L93 Difference]: Finished difference Result 488 states and 1470 transitions. [2021-07-13 19:38:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:38:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:59,511 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:38:59,511 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:38:59,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:38:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-07-13 19:38:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.187692307692308) internal successors, (1036), 325 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1036 transitions. [2021-07-13 19:38:59,518 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1036 transitions. Word has length 20 [2021-07-13 19:38:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:59,518 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1036 transitions. [2021-07-13 19:38:59,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1036 transitions. [2021-07-13 19:38:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:59,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:59,519 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:59,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,733 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1671879655, now seen corresponding path program 15 times [2021-07-13 19:38:59,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:59,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712994565] [2021-07-13 19:38:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:59,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712994565] [2021-07-13 19:38:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712994565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243391856] [2021-07-13 19:38:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:59,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:59,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:38:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:59,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:59,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:59,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:59,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:59,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-13 19:38:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243391856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:59,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:38:59,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415607053] [2021-07-13 19:38:59,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:59,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:59,950 INFO L87 Difference]: Start difference. First operand 326 states and 1036 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:00,223 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2021-07-13 19:39:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:00,226 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:39:00,226 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:39:00,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:39:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 329. [2021-07-13 19:39:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.192073170731707) internal successors, (1047), 328 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1047 transitions. [2021-07-13 19:39:00,233 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1047 transitions. Word has length 20 [2021-07-13 19:39:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:00,233 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1047 transitions. [2021-07-13 19:39:00,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1047 transitions. [2021-07-13 19:39:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:00,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:00,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:00,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 19:39:00,449 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash 177971933, now seen corresponding path program 16 times [2021-07-13 19:39:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:00,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698330192] [2021-07-13 19:39:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:00,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698330192] [2021-07-13 19:39:00,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698330192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590039833] [2021-07-13 19:39:00,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:00,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:00,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:00,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,618 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:00,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:00,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-13 19:39:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590039833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:00,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554877609] [2021-07-13 19:39:00,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:00,644 INFO L87 Difference]: Start difference. First operand 329 states and 1047 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:00,899 INFO L93 Difference]: Finished difference Result 497 states and 1488 transitions. [2021-07-13 19:39:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:00,901 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:39:00,901 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:39:00,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:39:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 329. [2021-07-13 19:39:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.182926829268293) internal successors, (1044), 328 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1044 transitions. [2021-07-13 19:39:00,908 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1044 transitions. Word has length 20 [2021-07-13 19:39:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:00,908 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1044 transitions. [2021-07-13 19:39:00,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1044 transitions. [2021-07-13 19:39:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:00,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:00,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:01,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-13 19:39:01,125 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1528996053, now seen corresponding path program 17 times [2021-07-13 19:39:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:01,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977058402] [2021-07-13 19:39:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977058402] [2021-07-13 19:39:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977058402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379103388] [2021-07-13 19:39:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:01,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:01,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:01,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379103388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:01,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:01,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097444811] [2021-07-13 19:39:01,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:01,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:01,360 INFO L87 Difference]: Start difference. First operand 329 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:01,622 INFO L93 Difference]: Finished difference Result 500 states and 1492 transitions. [2021-07-13 19:39:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:01,624 INFO L225 Difference]: With dead ends: 500 [2021-07-13 19:39:01,624 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:39:01,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:39:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-07-13 19:39:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.191616766467066) internal successors, (1066), 334 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1066 transitions. [2021-07-13 19:39:01,631 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1066 transitions. Word has length 20 [2021-07-13 19:39:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:01,631 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1066 transitions. [2021-07-13 19:39:01,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1066 transitions. [2021-07-13 19:39:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:01,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:01,632 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:01,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:39:01,850 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1272063521, now seen corresponding path program 18 times [2021-07-13 19:39:01,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:01,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051988373] [2021-07-13 19:39:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051988373] [2021-07-13 19:39:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051988373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299271879] [2021-07-13 19:39:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:01,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:01,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299271879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:02,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:02,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629182604] [2021-07-13 19:39:02,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:02,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:02,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:02,077 INFO L87 Difference]: Start difference. First operand 335 states and 1066 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:02,382 INFO L93 Difference]: Finished difference Result 506 states and 1499 transitions. [2021-07-13 19:39:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:02,385 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:39:02,385 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:39:02,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:39:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 332. [2021-07-13 19:39:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.187311178247734) internal successors, (1055), 331 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1055 transitions. [2021-07-13 19:39:02,391 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1055 transitions. Word has length 20 [2021-07-13 19:39:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:02,391 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1055 transitions. [2021-07-13 19:39:02,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1055 transitions. [2021-07-13 19:39:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:02,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:02,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:02,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 19:39:02,614 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1809919099, now seen corresponding path program 19 times [2021-07-13 19:39:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:02,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401965586] [2021-07-13 19:39:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401965586] [2021-07-13 19:39:02,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401965586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788920562] [2021-07-13 19:39:02,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788920562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:02,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:02,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705239606] [2021-07-13 19:39:02,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:02,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:02,829 INFO L87 Difference]: Start difference. First operand 332 states and 1055 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:03,097 INFO L93 Difference]: Finished difference Result 464 states and 1404 transitions. [2021-07-13 19:39:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:03,098 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:39:03,098 INFO L226 Difference]: Without dead ends: 452 [2021-07-13 19:39:03,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-13 19:39:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 332. [2021-07-13 19:39:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.178247734138973) internal successors, (1052), 331 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1052 transitions. [2021-07-13 19:39:03,104 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1052 transitions. Word has length 20 [2021-07-13 19:39:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:03,105 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1052 transitions. [2021-07-13 19:39:03,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1052 transitions. [2021-07-13 19:39:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:03,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:03,105 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:03,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:03,321 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1880172963, now seen corresponding path program 20 times [2021-07-13 19:39:03,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:03,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285351263] [2021-07-13 19:39:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:03,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285351263] [2021-07-13 19:39:03,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285351263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509709103] [2021-07-13 19:39:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:03,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509709103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768082714] [2021-07-13 19:39:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:03,560 INFO L87 Difference]: Start difference. First operand 332 states and 1052 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:03,872 INFO L93 Difference]: Finished difference Result 554 states and 1629 transitions. [2021-07-13 19:39:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:03,874 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:39:03,874 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:39:03,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:39:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 341. [2021-07-13 19:39:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1911764705882355) internal successors, (1085), 340 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1085 transitions. [2021-07-13 19:39:03,881 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1085 transitions. Word has length 20 [2021-07-13 19:39:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:03,881 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1085 transitions. [2021-07-13 19:39:03,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1085 transitions. [2021-07-13 19:39:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:03,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:03,882 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:04,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:04,087 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash 386265241, now seen corresponding path program 21 times [2021-07-13 19:39:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053424229] [2021-07-13 19:39:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053424229] [2021-07-13 19:39:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053424229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968486647] [2021-07-13 19:39:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:04,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:04,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968486647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:04,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257496375] [2021-07-13 19:39:04,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:04,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:04,319 INFO L87 Difference]: Start difference. First operand 341 states and 1085 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:04,725 INFO L93 Difference]: Finished difference Result 560 states and 1636 transitions. [2021-07-13 19:39:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:04,727 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:39:04,727 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:39:04,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:39:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 338. [2021-07-13 19:39:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1869436201780417) internal successors, (1074), 337 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1074 transitions. [2021-07-13 19:39:04,734 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1074 transitions. Word has length 20 [2021-07-13 19:39:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:04,734 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1074 transitions. [2021-07-13 19:39:04,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1074 transitions. [2021-07-13 19:39:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:04,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:04,735 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-13 19:39:04,945 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 924120819, now seen corresponding path program 22 times [2021-07-13 19:39:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:04,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146267479] [2021-07-13 19:39:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146267479] [2021-07-13 19:39:04,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146267479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764553898] [2021-07-13 19:39:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764553898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:05,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:05,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278025699] [2021-07-13 19:39:05,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:05,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:05,180 INFO L87 Difference]: Start difference. First operand 338 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:05,554 INFO L93 Difference]: Finished difference Result 524 states and 1554 transitions. [2021-07-13 19:39:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:05,556 INFO L225 Difference]: With dead ends: 524 [2021-07-13 19:39:05,556 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:39:05,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:39:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-07-13 19:39:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.182634730538922) internal successors, (1063), 334 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1063 transitions. [2021-07-13 19:39:05,563 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1063 transitions. Word has length 20 [2021-07-13 19:39:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:05,563 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1063 transitions. [2021-07-13 19:39:05,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1063 transitions. [2021-07-13 19:39:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:05,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:05,564 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:05,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,781 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1511866141, now seen corresponding path program 23 times [2021-07-13 19:39:05,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:05,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152175495] [2021-07-13 19:39:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:05,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152175495] [2021-07-13 19:39:05,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152175495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880766711] [2021-07-13 19:39:05,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:05,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880766711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:05,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530533422] [2021-07-13 19:39:05,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:05,972 INFO L87 Difference]: Start difference. First operand 335 states and 1063 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:06,263 INFO L93 Difference]: Finished difference Result 515 states and 1530 transitions. [2021-07-13 19:39:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:06,265 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:39:06,265 INFO L226 Difference]: Without dead ends: 497 [2021-07-13 19:39:06,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-13 19:39:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 335. [2021-07-13 19:39:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-13 19:39:06,271 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-13 19:39:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:06,272 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-13 19:39:06,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-13 19:39:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:06,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:06,272 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:06,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-13 19:39:06,486 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:06,486 INFO L82 PathProgramCache]: Analyzing trace with hash 426307966, now seen corresponding path program 24 times [2021-07-13 19:39:06,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:06,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417273295] [2021-07-13 19:39:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:06,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417273295] [2021-07-13 19:39:06,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417273295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367038329] [2021-07-13 19:39:06,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:06,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:06,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:06,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:06,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,675 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:39:06,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:06,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:39:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:06,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367038329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:06,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:06,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:39:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930212093] [2021-07-13 19:39:06,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:06,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:06,725 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:06,983 INFO L93 Difference]: Finished difference Result 487 states and 1495 transitions. [2021-07-13 19:39:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:06,985 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:39:06,985 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:39:06,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:39:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-07-13 19:39:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-13 19:39:06,996 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-13 19:39:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:06,996 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-13 19:39:06,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-13 19:39:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:06,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:06,997 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,205 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1652166947, now seen corresponding path program 25 times [2021-07-13 19:39:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849343638] [2021-07-13 19:39:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849343638] [2021-07-13 19:39:07,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849343638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687125993] [2021-07-13 19:39:07,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:07,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:07,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,426 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:07,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:07,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-13 19:39:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687125993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:07,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:07,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339654551] [2021-07-13 19:39:07,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:07,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:07,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:07,449 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:07,644 INFO L93 Difference]: Finished difference Result 542 states and 1611 transitions. [2021-07-13 19:39:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:07,646 INFO L225 Difference]: With dead ends: 542 [2021-07-13 19:39:07,646 INFO L226 Difference]: Without dead ends: 542 [2021-07-13 19:39:07,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-13 19:39:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 345. [2021-07-13 19:39:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.1569767441860463) internal successors, (1086), 344 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1086 transitions. [2021-07-13 19:39:07,671 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1086 transitions. Word has length 20 [2021-07-13 19:39:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:07,671 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1086 transitions. [2021-07-13 19:39:07,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1086 transitions. [2021-07-13 19:39:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:07,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:07,672 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-13 19:39:07,885 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1484156819, now seen corresponding path program 26 times [2021-07-13 19:39:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361028842] [2021-07-13 19:39:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361028842] [2021-07-13 19:39:07,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361028842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743125969] [2021-07-13 19:39:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:08,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:08,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,107 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:08,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:08,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-13 19:39:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743125969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:08,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:08,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48940546] [2021-07-13 19:39:08,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:08,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:08,133 INFO L87 Difference]: Start difference. First operand 345 states and 1086 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:08,354 INFO L93 Difference]: Finished difference Result 594 states and 1732 transitions. [2021-07-13 19:39:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:08,356 INFO L225 Difference]: With dead ends: 594 [2021-07-13 19:39:08,356 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 19:39:08,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 19:39:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 348. [2021-07-13 19:39:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.161383285302594) internal successors, (1097), 347 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1097 transitions. [2021-07-13 19:39:08,362 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1097 transitions. Word has length 20 [2021-07-13 19:39:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:08,362 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1097 transitions. [2021-07-13 19:39:08,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1097 transitions. [2021-07-13 19:39:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:08,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:08,363 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:08,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,577 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1316902755, now seen corresponding path program 27 times [2021-07-13 19:39:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:08,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49947589] [2021-07-13 19:39:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:08,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49947589] [2021-07-13 19:39:08,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49947589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068693862] [2021-07-13 19:39:08,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:08,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:08,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,769 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:08,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:08,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-13 19:39:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068693862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:08,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:08,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113154691] [2021-07-13 19:39:08,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:08,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:08,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:08,794 INFO L87 Difference]: Start difference. First operand 348 states and 1097 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:09,004 INFO L93 Difference]: Finished difference Result 551 states and 1629 transitions. [2021-07-13 19:39:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:09,006 INFO L225 Difference]: With dead ends: 551 [2021-07-13 19:39:09,006 INFO L226 Difference]: Without dead ends: 545 [2021-07-13 19:39:09,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-13 19:39:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 340. [2021-07-13 19:39:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1651917404129795) internal successors, (1073), 339 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1073 transitions. [2021-07-13 19:39:09,012 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1073 transitions. Word has length 20 [2021-07-13 19:39:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:09,012 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1073 transitions. [2021-07-13 19:39:09,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1073 transitions. [2021-07-13 19:39:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:09,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:09,013 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:09,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-13 19:39:09,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash -390065231, now seen corresponding path program 28 times [2021-07-13 19:39:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407576206] [2021-07-13 19:39:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:09,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407576206] [2021-07-13 19:39:09,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407576206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521888043] [2021-07-13 19:39:09,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:09,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521888043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:09,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:09,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075933496] [2021-07-13 19:39:09,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:09,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:09,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:09,468 INFO L87 Difference]: Start difference. First operand 340 states and 1073 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:09,720 INFO L93 Difference]: Finished difference Result 520 states and 1545 transitions. [2021-07-13 19:39:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:09,723 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:39:09,723 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:39:09,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:39:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2021-07-13 19:39:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1739130434782608) internal successors, (1095), 345 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1095 transitions. [2021-07-13 19:39:09,731 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1095 transitions. Word has length 20 [2021-07-13 19:39:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:09,731 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1095 transitions. [2021-07-13 19:39:09,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1095 transitions. [2021-07-13 19:39:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:09,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:09,732 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:09,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,936 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1883972953, now seen corresponding path program 29 times [2021-07-13 19:39:09,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:09,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682754784] [2021-07-13 19:39:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682754784] [2021-07-13 19:39:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682754784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082727673] [2021-07-13 19:39:09,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:10,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082727673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:10,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409613600] [2021-07-13 19:39:10,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:10,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:10,204 INFO L87 Difference]: Start difference. First operand 346 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:10,480 INFO L93 Difference]: Finished difference Result 526 states and 1552 transitions. [2021-07-13 19:39:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:10,482 INFO L225 Difference]: With dead ends: 526 [2021-07-13 19:39:10,482 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:39:10,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:39:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2021-07-13 19:39:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1695906432748537) internal successors, (1084), 342 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1084 transitions. [2021-07-13 19:39:10,488 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1084 transitions. Word has length 20 [2021-07-13 19:39:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:10,488 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1084 transitions. [2021-07-13 19:39:10,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1084 transitions. [2021-07-13 19:39:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:10,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:10,489 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:10,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 19:39:10,713 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1346117375, now seen corresponding path program 30 times [2021-07-13 19:39:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:10,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996956360] [2021-07-13 19:39:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996956360] [2021-07-13 19:39:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996956360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794349312] [2021-07-13 19:39:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794349312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:10,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135627994] [2021-07-13 19:39:10,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:10,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:10,951 INFO L87 Difference]: Start difference. First operand 343 states and 1084 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:11,203 INFO L93 Difference]: Finished difference Result 484 states and 1457 transitions. [2021-07-13 19:39:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:11,205 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:39:11,205 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:39:11,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:39:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 335. [2021-07-13 19:39:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-13 19:39:11,210 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-13 19:39:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:11,211 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-13 19:39:11,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-13 19:39:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:11,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:11,211 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:11,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-13 19:39:11,425 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1184106974, now seen corresponding path program 31 times [2021-07-13 19:39:11,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:11,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150565068] [2021-07-13 19:39:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150565068] [2021-07-13 19:39:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150565068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12258510] [2021-07-13 19:39:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:11,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:11,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,604 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-13 19:39:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:11,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:11,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:11,635 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:39:11,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:11,636 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-07-13 19:39:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12258510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:11,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:39:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796957606] [2021-07-13 19:39:11,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:11,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:11,702 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:11,991 INFO L93 Difference]: Finished difference Result 528 states and 1594 transitions. [2021-07-13 19:39:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:11,993 INFO L225 Difference]: With dead ends: 528 [2021-07-13 19:39:11,993 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:39:11,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:39:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 340. [2021-07-13 19:39:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.200589970501475) internal successors, (1085), 339 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1085 transitions. [2021-07-13 19:39:11,998 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1085 transitions. Word has length 20 [2021-07-13 19:39:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:11,998 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1085 transitions. [2021-07-13 19:39:11,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1085 transitions. [2021-07-13 19:39:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:11,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:11,999 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:12,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,213 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2101485159, now seen corresponding path program 32 times [2021-07-13 19:39:12,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:12,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494411359] [2021-07-13 19:39:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494411359] [2021-07-13 19:39:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494411359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182936472] [2021-07-13 19:39:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:12,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,474 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-07-13 19:39:12,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:12,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,511 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-07-13 19:39:12,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:12,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:12,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,535 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:39:12,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:12,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-07-13 19:39:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182936472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:12,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692040256] [2021-07-13 19:39:12,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:12,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:12,582 INFO L87 Difference]: Start difference. First operand 340 states and 1085 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,013 INFO L93 Difference]: Finished difference Result 649 states and 1911 transitions. [2021-07-13 19:39:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,016 INFO L225 Difference]: With dead ends: 649 [2021-07-13 19:39:13,016 INFO L226 Difference]: Without dead ends: 649 [2021-07-13 19:39:13,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-13 19:39:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 352. [2021-07-13 19:39:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.207977207977208) internal successors, (1126), 351 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1126 transitions. [2021-07-13 19:39:13,028 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1126 transitions. Word has length 20 [2021-07-13 19:39:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,029 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1126 transitions. [2021-07-13 19:39:13,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1126 transitions. [2021-07-13 19:39:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:13,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,029 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:13,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,241 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash -942841629, now seen corresponding path program 33 times [2021-07-13 19:39:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047852086] [2021-07-13 19:39:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:13,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047852086] [2021-07-13 19:39:13,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047852086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700353976] [2021-07-13 19:39:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:13,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:13,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:13,498 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-13 19:39:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:13,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:13,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:13,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:13,528 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:39:13,528 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:13,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:13,529 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:39:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700353976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:13,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:13,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259321337] [2021-07-13 19:39:13,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:13,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:13,587 INFO L87 Difference]: Start difference. First operand 352 states and 1126 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,901 INFO L93 Difference]: Finished difference Result 701 states and 2032 transitions. [2021-07-13 19:39:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,904 INFO L225 Difference]: With dead ends: 701 [2021-07-13 19:39:13,904 INFO L226 Difference]: Without dead ends: 701 [2021-07-13 19:39:13,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-07-13 19:39:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 358. [2021-07-13 19:39:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.224089635854342) internal successors, (1151), 357 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1151 transitions. [2021-07-13 19:39:13,915 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1151 transitions. Word has length 20 [2021-07-13 19:39:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,915 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1151 transitions. [2021-07-13 19:39:13,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1151 transitions. [2021-07-13 19:39:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:13,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,916 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,129 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1858217945, now seen corresponding path program 34 times [2021-07-13 19:39:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453347667] [2021-07-13 19:39:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453347667] [2021-07-13 19:39:14,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453347667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523900719] [2021-07-13 19:39:14,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:14,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:14,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:14,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,357 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-13 19:39:14,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:14,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:14,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:14,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:14,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-13 19:39:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523900719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:14,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110217796] [2021-07-13 19:39:14,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:14,416 INFO L87 Difference]: Start difference. First operand 358 states and 1151 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:14,712 INFO L93 Difference]: Finished difference Result 658 states and 1923 transitions. [2021-07-13 19:39:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:14,714 INFO L225 Difference]: With dead ends: 658 [2021-07-13 19:39:14,714 INFO L226 Difference]: Without dead ends: 652 [2021-07-13 19:39:14,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-13 19:39:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2021-07-13 19:39:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.211267605633803) internal successors, (1140), 355 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1140 transitions. [2021-07-13 19:39:14,721 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1140 transitions. Word has length 20 [2021-07-13 19:39:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:14,721 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1140 transitions. [2021-07-13 19:39:14,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1140 transitions. [2021-07-13 19:39:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:14,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:14,722 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,933 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1690972674, now seen corresponding path program 35 times [2021-07-13 19:39:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425890992] [2021-07-13 19:39:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425890992] [2021-07-13 19:39:14,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425890992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010934353] [2021-07-13 19:39:14,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:15,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:15,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:15,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:15,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:15,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,113 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-13 19:39:15,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:15,114 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-13 19:39:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010934353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:15,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:39:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515355211] [2021-07-13 19:39:15,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:15,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:15,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:15,178 INFO L87 Difference]: Start difference. First operand 356 states and 1140 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:15,443 INFO L93 Difference]: Finished difference Result 461 states and 1410 transitions. [2021-07-13 19:39:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:15,445 INFO L225 Difference]: With dead ends: 461 [2021-07-13 19:39:15,445 INFO L226 Difference]: Without dead ends: 399 [2021-07-13 19:39:15,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-13 19:39:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 347. [2021-07-13 19:39:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1763005780346822) internal successors, (1099), 346 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1099 transitions. [2021-07-13 19:39:15,459 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1099 transitions. Word has length 20 [2021-07-13 19:39:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:15,460 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1099 transitions. [2021-07-13 19:39:15,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1099 transitions. [2021-07-13 19:39:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:15,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:15,460 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:15,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-13 19:39:15,677 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -282908061, now seen corresponding path program 36 times [2021-07-13 19:39:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:15,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294989893] [2021-07-13 19:39:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294989893] [2021-07-13 19:39:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294989893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793839218] [2021-07-13 19:39:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:15,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,900 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-13 19:39:15,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:15,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:15,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:15,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:39:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793839218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:15,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:15,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223857312] [2021-07-13 19:39:15,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:15,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:15,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:15,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:15,968 INFO L87 Difference]: Start difference. First operand 347 states and 1099 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,265 INFO L93 Difference]: Finished difference Result 602 states and 1789 transitions. [2021-07-13 19:39:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,266 INFO L225 Difference]: With dead ends: 602 [2021-07-13 19:39:16,266 INFO L226 Difference]: Without dead ends: 602 [2021-07-13 19:39:16,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-13 19:39:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 337. [2021-07-13 19:39:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1785714285714284) internal successors, (1068), 336 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1068 transitions. [2021-07-13 19:39:16,272 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1068 transitions. Word has length 20 [2021-07-13 19:39:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,272 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1068 transitions. [2021-07-13 19:39:16,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1068 transitions. [2021-07-13 19:39:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:16,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,273 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:16,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,493 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1350143331, now seen corresponding path program 37 times [2021-07-13 19:39:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:16,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016064413] [2021-07-13 19:39:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016064413] [2021-07-13 19:39:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016064413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72595507] [2021-07-13 19:39:16,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:16,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,722 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-13 19:39:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:16,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:16,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,745 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:39:16,746 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:16,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:16,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:39:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72595507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:16,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:16,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821322817] [2021-07-13 19:39:16,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:16,827 INFO L87 Difference]: Start difference. First operand 337 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:17,261 INFO L93 Difference]: Finished difference Result 598 states and 1773 transitions. [2021-07-13 19:39:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:17,262 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:39:17,262 INFO L226 Difference]: Without dead ends: 598 [2021-07-13 19:39:17,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-13 19:39:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 340. [2021-07-13 19:39:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1946902654867255) internal successors, (1083), 339 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-07-13 19:39:17,269 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-07-13 19:39:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:17,269 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-07-13 19:39:17,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-07-13 19:39:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:17,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:17,269 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:17,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,470 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -606993625, now seen corresponding path program 38 times [2021-07-13 19:39:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:17,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097198021] [2021-07-13 19:39:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:17,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097198021] [2021-07-13 19:39:17,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097198021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435090129] [2021-07-13 19:39:17,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:17,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:17,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:17,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:17,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,692 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-07-13 19:39:17,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:17,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:17,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,728 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:39:17,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:17,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-13 19:39:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435090129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:17,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:17,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142584589] [2021-07-13 19:39:17,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:17,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:17,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:17,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:17,809 INFO L87 Difference]: Start difference. First operand 340 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:18,104 INFO L93 Difference]: Finished difference Result 536 states and 1630 transitions. [2021-07-13 19:39:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:18,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:18,105 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:39:18,105 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:39:18,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:39:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-07-13 19:39:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1946902654867255) internal successors, (1083), 339 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-07-13 19:39:18,111 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-07-13 19:39:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,111 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-07-13 19:39:18,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-07-13 19:39:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:18,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,112 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,313 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 681956465, now seen corresponding path program 39 times [2021-07-13 19:39:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21351531] [2021-07-13 19:39:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:18,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21351531] [2021-07-13 19:39:18,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21351531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112743321] [2021-07-13 19:39:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:18,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:18,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:18,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,581 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-13 19:39:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:18,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,607 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-07-13 19:39:18,607 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:18,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:18,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:39:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112743321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:18,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:18,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801150114] [2021-07-13 19:39:18,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:18,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:18,690 INFO L87 Difference]: Start difference. First operand 340 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,058 INFO L93 Difference]: Finished difference Result 646 states and 1914 transitions. [2021-07-13 19:39:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,060 INFO L225 Difference]: With dead ends: 646 [2021-07-13 19:39:19,060 INFO L226 Difference]: Without dead ends: 646 [2021-07-13 19:39:19,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-13 19:39:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 348. [2021-07-13 19:39:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.2247838616714697) internal successors, (1119), 347 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1119 transitions. [2021-07-13 19:39:19,066 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1119 transitions. Word has length 20 [2021-07-13 19:39:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,067 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1119 transitions. [2021-07-13 19:39:19,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1119 transitions. [2021-07-13 19:39:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:19,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,067 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:19,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:39:19,284 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash -811951257, now seen corresponding path program 40 times [2021-07-13 19:39:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458085860] [2021-07-13 19:39:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:19,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458085860] [2021-07-13 19:39:19,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458085860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161936094] [2021-07-13 19:39:19,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:19,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:19,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:19,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:19,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:19,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:19,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:19,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,516 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-07-13 19:39:19,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:19,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,540 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-13 19:39:19,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:19,541 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-07-13 19:39:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161936094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:19,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:19,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846185869] [2021-07-13 19:39:19,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:19,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:19,626 INFO L87 Difference]: Start difference. First operand 348 states and 1119 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,963 INFO L93 Difference]: Finished difference Result 632 states and 1863 transitions. [2021-07-13 19:39:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,964 INFO L225 Difference]: With dead ends: 632 [2021-07-13 19:39:19,964 INFO L226 Difference]: Without dead ends: 626 [2021-07-13 19:39:19,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-07-13 19:39:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 351. [2021-07-13 19:39:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.202857142857143) internal successors, (1121), 350 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1121 transitions. [2021-07-13 19:39:19,971 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1121 transitions. Word has length 20 [2021-07-13 19:39:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,971 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1121 transitions. [2021-07-13 19:39:19,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1121 transitions. [2021-07-13 19:39:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:19,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,971 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:20,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:20,181 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1433356903, now seen corresponding path program 41 times [2021-07-13 19:39:20,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:20,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346789767] [2021-07-13 19:39:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346789767] [2021-07-13 19:39:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346789767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843772308] [2021-07-13 19:39:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:20,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:20,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:20,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:20,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,447 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-13 19:39:20,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:20,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:20,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,491 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-07-13 19:39:20,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:20,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:20,516 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-13 19:39:20,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:20,517 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:39:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843772308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:20,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220126097] [2021-07-13 19:39:20,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:20,606 INFO L87 Difference]: Start difference. First operand 351 states and 1121 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,090 INFO L93 Difference]: Finished difference Result 677 states and 1978 transitions. [2021-07-13 19:39:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,092 INFO L225 Difference]: With dead ends: 677 [2021-07-13 19:39:21,092 INFO L226 Difference]: Without dead ends: 677 [2021-07-13 19:39:21,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-13 19:39:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 344. [2021-07-13 19:39:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2157434402332363) internal successors, (1103), 343 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1103 transitions. [2021-07-13 19:39:21,099 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1103 transitions. Word has length 20 [2021-07-13 19:39:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,099 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1103 transitions. [2021-07-13 19:39:21,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1103 transitions. [2021-07-13 19:39:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:21,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,100 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:21,300 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1569267993, now seen corresponding path program 42 times [2021-07-13 19:39:21,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:21,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965151604] [2021-07-13 19:39:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965151604] [2021-07-13 19:39:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965151604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108315397] [2021-07-13 19:39:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:21,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:21,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:21,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:21,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:21,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:21,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:21,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,558 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:39:21,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:21,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:39:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108315397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:21,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205960489] [2021-07-13 19:39:21,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:21,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:21,640 INFO L87 Difference]: Start difference. First operand 344 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,979 INFO L93 Difference]: Finished difference Result 611 states and 1830 transitions. [2021-07-13 19:39:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,981 INFO L225 Difference]: With dead ends: 611 [2021-07-13 19:39:21,981 INFO L226 Difference]: Without dead ends: 611 [2021-07-13 19:39:21,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-13 19:39:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 341. [2021-07-13 19:39:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.2) internal successors, (1088), 340 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1088 transitions. [2021-07-13 19:39:21,987 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1088 transitions. Word has length 20 [2021-07-13 19:39:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,987 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1088 transitions. [2021-07-13 19:39:21,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1088 transitions. [2021-07-13 19:39:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:21,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,988 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:22,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,197 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1454093431, now seen corresponding path program 43 times [2021-07-13 19:39:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:22,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465468367] [2021-07-13 19:39:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465468367] [2021-07-13 19:39:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465468367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92258495] [2021-07-13 19:39:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:22,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:22,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:22,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,433 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-07-13 19:39:22,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:22,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,465 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-07-13 19:39:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:22,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:22,488 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:39:22,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:22,488 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-13 19:39:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92258495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437184450] [2021-07-13 19:39:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:22,570 INFO L87 Difference]: Start difference. First operand 341 states and 1088 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:23,031 INFO L93 Difference]: Finished difference Result 583 states and 1732 transitions. [2021-07-13 19:39:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:23,032 INFO L225 Difference]: With dead ends: 583 [2021-07-13 19:39:23,032 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 19:39:23,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 19:39:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 351. [2021-07-13 19:39:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1857142857142855) internal successors, (1115), 350 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1115 transitions. [2021-07-13 19:39:23,038 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1115 transitions. Word has length 20 [2021-07-13 19:39:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1115 transitions. [2021-07-13 19:39:23,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1115 transitions. [2021-07-13 19:39:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:23,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:23,051 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:23,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,252 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -461330495, now seen corresponding path program 44 times [2021-07-13 19:39:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:23,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854799784] [2021-07-13 19:39:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854799784] [2021-07-13 19:39:23,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854799784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627790320] [2021-07-13 19:39:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:23,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:23,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:23,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:23,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,505 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-13 19:39:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:23,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,532 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-07-13 19:39:23,532 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:23,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:23,532 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:39:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627790320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:23,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:23,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356180958] [2021-07-13 19:39:23,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:23,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:23,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:23,609 INFO L87 Difference]: Start difference. First operand 351 states and 1115 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:23,885 INFO L93 Difference]: Finished difference Result 554 states and 1678 transitions. [2021-07-13 19:39:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:23,886 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:39:23,886 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:39:23,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:39:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 343. [2021-07-13 19:39:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.195906432748538) internal successors, (1093), 342 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1093 transitions. [2021-07-13 19:39:23,892 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1093 transitions. Word has length 20 [2021-07-13 19:39:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:23,892 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1093 transitions. [2021-07-13 19:39:23,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1093 transitions. [2021-07-13 19:39:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:23,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:23,893 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-07-13 19:39:24,094 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1560931869, now seen corresponding path program 45 times [2021-07-13 19:39:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822054844] [2021-07-13 19:39:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822054844] [2021-07-13 19:39:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822054844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367190006] [2021-07-13 19:39:24,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367190006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:24,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:24,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374678459] [2021-07-13 19:39:24,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:24,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:24,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:24,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:24,371 INFO L87 Difference]: Start difference. First operand 343 states and 1093 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,637 INFO L93 Difference]: Finished difference Result 531 states and 1604 transitions. [2021-07-13 19:39:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:24,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,638 INFO L225 Difference]: With dead ends: 531 [2021-07-13 19:39:24,638 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:39:24,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:39:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 350. [2021-07-13 19:39:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.2091690544412605) internal successors, (1120), 349 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1120 transitions. [2021-07-13 19:39:24,644 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1120 transitions. Word has length 20 [2021-07-13 19:39:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,644 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1120 transitions. [2021-07-13 19:39:24,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1120 transitions. [2021-07-13 19:39:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:24,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,645 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,853 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1240127705, now seen corresponding path program 46 times [2021-07-13 19:39:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799980351] [2021-07-13 19:39:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:24,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799980351] [2021-07-13 19:39:24,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799980351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531743626] [2021-07-13 19:39:24,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:24,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531743626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:25,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649815049] [2021-07-13 19:39:25,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:25,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:25,124 INFO L87 Difference]: Start difference. First operand 350 states and 1120 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:25,464 INFO L93 Difference]: Finished difference Result 537 states and 1611 transitions. [2021-07-13 19:39:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:25,465 INFO L225 Difference]: With dead ends: 537 [2021-07-13 19:39:25,465 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:39:25,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:39:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 347. [2021-07-13 19:39:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2052023121387285) internal successors, (1109), 346 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1109 transitions. [2021-07-13 19:39:25,471 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1109 transitions. Word has length 20 [2021-07-13 19:39:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:25,471 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1109 transitions. [2021-07-13 19:39:25,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1109 transitions. [2021-07-13 19:39:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:25,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:25,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:25,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 19:39:25,674 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1777983283, now seen corresponding path program 47 times [2021-07-13 19:39:25,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:25,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977930131] [2021-07-13 19:39:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977930131] [2021-07-13 19:39:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977930131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828671802] [2021-07-13 19:39:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:25,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828671802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:25,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791986001] [2021-07-13 19:39:25,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:25,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:25,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:25,935 INFO L87 Difference]: Start difference. First operand 347 states and 1109 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:26,246 INFO L93 Difference]: Finished difference Result 501 states and 1529 transitions. [2021-07-13 19:39:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:26,247 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:39:26,248 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:39:26,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:39:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 344. [2021-07-13 19:39:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2011661807580176) internal successors, (1098), 343 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-07-13 19:39:26,253 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-07-13 19:39:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:26,253 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-07-13 19:39:26,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-07-13 19:39:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:26,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:26,254 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:26,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:26,455 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash 257645229, now seen corresponding path program 48 times [2021-07-13 19:39:26,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:26,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041588585] [2021-07-13 19:39:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:26,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041588585] [2021-07-13 19:39:26,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041588585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572316142] [2021-07-13 19:39:26,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:26,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572316142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:26,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132393325] [2021-07-13 19:39:26,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:26,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:26,738 INFO L87 Difference]: Start difference. First operand 344 states and 1098 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:27,172 INFO L93 Difference]: Finished difference Result 615 states and 1814 transitions. [2021-07-13 19:39:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:27,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:27,173 INFO L225 Difference]: With dead ends: 615 [2021-07-13 19:39:27,174 INFO L226 Difference]: Without dead ends: 615 [2021-07-13 19:39:27,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-13 19:39:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 352. [2021-07-13 19:39:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.230769230769231) internal successors, (1134), 351 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1134 transitions. [2021-07-13 19:39:27,181 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1134 transitions. Word has length 20 [2021-07-13 19:39:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:27,181 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1134 transitions. [2021-07-13 19:39:27,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1134 transitions. [2021-07-13 19:39:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:27,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:27,182 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:27,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:27,383 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1236262493, now seen corresponding path program 49 times [2021-07-13 19:39:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:27,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965155320] [2021-07-13 19:39:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965155320] [2021-07-13 19:39:27,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965155320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529373689] [2021-07-13 19:39:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529373689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:27,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:27,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262634122] [2021-07-13 19:39:27,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:27,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:27,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:27,678 INFO L87 Difference]: Start difference. First operand 352 states and 1134 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:28,224 INFO L93 Difference]: Finished difference Result 621 states and 1815 transitions. [2021-07-13 19:39:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:28,229 INFO L225 Difference]: With dead ends: 621 [2021-07-13 19:39:28,229 INFO L226 Difference]: Without dead ends: 615 [2021-07-13 19:39:28,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-13 19:39:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 355. [2021-07-13 19:39:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.209039548022599) internal successors, (1136), 354 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1136 transitions. [2021-07-13 19:39:28,235 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1136 transitions. Word has length 20 [2021-07-13 19:39:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:28,235 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1136 transitions. [2021-07-13 19:39:28,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1136 transitions. [2021-07-13 19:39:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:28,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:28,236 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:28,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,452 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1009045667, now seen corresponding path program 50 times [2021-07-13 19:39:28,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:28,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63956474] [2021-07-13 19:39:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:28,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63956474] [2021-07-13 19:39:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63956474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054000767] [2021-07-13 19:39:28,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054000767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:28,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632574487] [2021-07-13 19:39:28,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:28,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:28,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:28,739 INFO L87 Difference]: Start difference. First operand 355 states and 1136 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,117 INFO L93 Difference]: Finished difference Result 612 states and 1801 transitions. [2021-07-13 19:39:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,119 INFO L225 Difference]: With dead ends: 612 [2021-07-13 19:39:29,119 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 19:39:29,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 19:39:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 348. [2021-07-13 19:39:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.2219020172910664) internal successors, (1118), 347 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1118 transitions. [2021-07-13 19:39:29,125 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1118 transitions. Word has length 20 [2021-07-13 19:39:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,125 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1118 transitions. [2021-07-13 19:39:29,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1118 transitions. [2021-07-13 19:39:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:29,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,134 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 19:39:29,335 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1993579229, now seen corresponding path program 51 times [2021-07-13 19:39:29,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010712493] [2021-07-13 19:39:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:29,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010712493] [2021-07-13 19:39:29,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010712493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382144124] [2021-07-13 19:39:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:29,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:29,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382144124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074769542] [2021-07-13 19:39:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:29,602 INFO L87 Difference]: Start difference. First operand 348 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,814 INFO L93 Difference]: Finished difference Result 546 states and 1653 transitions. [2021-07-13 19:39:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:29,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,815 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:39:29,815 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:39:29,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:39:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 345. [2021-07-13 19:39:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.2063953488372094) internal successors, (1103), 344 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-07-13 19:39:29,821 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-07-13 19:39:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,821 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-07-13 19:39:29,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-07-13 19:39:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:29,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,821 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:30,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-13 19:39:30,022 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1029782195, now seen corresponding path program 52 times [2021-07-13 19:39:30,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:30,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528885583] [2021-07-13 19:39:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528885583] [2021-07-13 19:39:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528885583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41795443] [2021-07-13 19:39:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:30,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41795443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:30,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:30,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630681022] [2021-07-13 19:39:30,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:30,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:30,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:30,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:30,274 INFO L87 Difference]: Start difference. First operand 345 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:30,803 INFO L93 Difference]: Finished difference Result 589 states and 1742 transitions. [2021-07-13 19:39:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:30,805 INFO L225 Difference]: With dead ends: 589 [2021-07-13 19:39:30,805 INFO L226 Difference]: Without dead ends: 583 [2021-07-13 19:39:30,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-07-13 19:39:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-07-13 19:39:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1920903954802258) internal successors, (1130), 354 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1130 transitions. [2021-07-13 19:39:30,811 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1130 transitions. Word has length 20 [2021-07-13 19:39:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:30,811 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1130 transitions. [2021-07-13 19:39:30,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1130 transitions. [2021-07-13 19:39:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:30,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:30,811 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 19:39:31,028 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash -885641731, now seen corresponding path program 53 times [2021-07-13 19:39:31,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818661282] [2021-07-13 19:39:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818661282] [2021-07-13 19:39:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818661282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234191693] [2021-07-13 19:39:31,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234191693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:31,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:31,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277811224] [2021-07-13 19:39:31,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:31,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:31,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:31,288 INFO L87 Difference]: Start difference. First operand 355 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,687 INFO L93 Difference]: Finished difference Result 560 states and 1688 transitions. [2021-07-13 19:39:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,689 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:39:31,689 INFO L226 Difference]: Without dead ends: 560 [2021-07-13 19:39:31,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-13 19:39:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 344. [2021-07-13 19:39:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2011661807580176) internal successors, (1098), 343 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-07-13 19:39:31,695 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-07-13 19:39:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,695 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-07-13 19:39:31,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-07-13 19:39:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:31,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,696 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,909 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash -989075421, now seen corresponding path program 54 times [2021-07-13 19:39:31,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173950237] [2021-07-13 19:39:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173950237] [2021-07-13 19:39:31,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173950237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589697140] [2021-07-13 19:39:31,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589697140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588018149] [2021-07-13 19:39:32,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:32,157 INFO L87 Difference]: Start difference. First operand 344 states and 1098 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:32,434 INFO L93 Difference]: Finished difference Result 492 states and 1505 transitions. [2021-07-13 19:39:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:32,435 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:39:32,435 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:39:32,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:39:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 346. [2021-07-13 19:39:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.197101449275362) internal successors, (1103), 345 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-07-13 19:39:32,440 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-07-13 19:39:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:32,440 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-07-13 19:39:32,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-07-13 19:39:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:32,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:32,442 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:32,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 19:39:32,661 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash -237674983, now seen corresponding path program 55 times [2021-07-13 19:39:32,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:32,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924517448] [2021-07-13 19:39:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:32,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924517448] [2021-07-13 19:39:32,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924517448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309974274] [2021-07-13 19:39:32,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309974274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:32,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433807217] [2021-07-13 19:39:32,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:32,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:32,919 INFO L87 Difference]: Start difference. First operand 346 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:33,355 INFO L93 Difference]: Finished difference Result 517 states and 1557 transitions. [2021-07-13 19:39:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:33,356 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:39:33,356 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:39:33,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:39:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 356. [2021-07-13 19:39:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.183098591549296) internal successors, (1130), 355 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1130 transitions. [2021-07-13 19:39:33,364 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1130 transitions. Word has length 20 [2021-07-13 19:39:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:33,364 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1130 transitions. [2021-07-13 19:39:33,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1130 transitions. [2021-07-13 19:39:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:33,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:33,365 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,581 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2141868387, now seen corresponding path program 56 times [2021-07-13 19:39:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:33,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835432056] [2021-07-13 19:39:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835432056] [2021-07-13 19:39:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835432056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366787535] [2021-07-13 19:39:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366787535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071000697] [2021-07-13 19:39:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:33,842 INFO L87 Difference]: Start difference. First operand 356 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,135 INFO L93 Difference]: Finished difference Result 488 states and 1503 transitions. [2021-07-13 19:39:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,136 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:39:34,137 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:39:34,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:39:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 346. [2021-07-13 19:39:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.197101449275362) internal successors, (1103), 345 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-07-13 19:39:34,142 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-07-13 19:39:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,142 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-07-13 19:39:34,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-07-13 19:39:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:34,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,143 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-13 19:39:34,360 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -56954447, now seen corresponding path program 57 times [2021-07-13 19:39:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677028400] [2021-07-13 19:39:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:34,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677028400] [2021-07-13 19:39:34,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677028400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473852417] [2021-07-13 19:39:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473852417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:34,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:34,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049688284] [2021-07-13 19:39:34,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:34,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:34,643 INFO L87 Difference]: Start difference. First operand 346 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:35,071 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-07-13 19:39:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:35,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:35,073 INFO L225 Difference]: With dead ends: 688 [2021-07-13 19:39:35,073 INFO L226 Difference]: Without dead ends: 688 [2021-07-13 19:39:35,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-13 19:39:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 356. [2021-07-13 19:39:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.2140845070422537) internal successors, (1141), 355 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1141 transitions. [2021-07-13 19:39:35,080 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1141 transitions. Word has length 20 [2021-07-13 19:39:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:35,080 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1141 transitions. [2021-07-13 19:39:35,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1141 transitions. [2021-07-13 19:39:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:35,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:35,080 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:35,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:35,281 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1550862169, now seen corresponding path program 58 times [2021-07-13 19:39:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054635649] [2021-07-13 19:39:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:35,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054635649] [2021-07-13 19:39:35,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054635649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257893195] [2021-07-13 19:39:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:35,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:35,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:35,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257893195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:35,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:35,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414625473] [2021-07-13 19:39:35,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:35,550 INFO L87 Difference]: Start difference. First operand 356 states and 1141 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:36,110 INFO L93 Difference]: Finished difference Result 694 states and 2066 transitions. [2021-07-13 19:39:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:36,112 INFO L225 Difference]: With dead ends: 694 [2021-07-13 19:39:36,112 INFO L226 Difference]: Without dead ends: 688 [2021-07-13 19:39:36,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-13 19:39:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 353. [2021-07-13 19:39:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.210227272727273) internal successors, (1130), 352 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1130 transitions. [2021-07-13 19:39:36,118 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1130 transitions. Word has length 20 [2021-07-13 19:39:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:36,119 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1130 transitions. [2021-07-13 19:39:36,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1130 transitions. [2021-07-13 19:39:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:36,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:36,119 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:36,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-13 19:39:36,320 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1013006591, now seen corresponding path program 59 times [2021-07-13 19:39:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:36,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451745410] [2021-07-13 19:39:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:36,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451745410] [2021-07-13 19:39:36,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451745410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469544258] [2021-07-13 19:39:36,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:36,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469544258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:36,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:36,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008087246] [2021-07-13 19:39:36,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:36,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:36,571 INFO L87 Difference]: Start difference. First operand 353 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:37,013 INFO L93 Difference]: Finished difference Result 658 states and 1984 transitions. [2021-07-13 19:39:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:37,015 INFO L225 Difference]: With dead ends: 658 [2021-07-13 19:39:37,015 INFO L226 Difference]: Without dead ends: 646 [2021-07-13 19:39:37,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-13 19:39:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 350. [2021-07-13 19:39:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.206303724928367) internal successors, (1119), 349 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1119 transitions. [2021-07-13 19:39:37,021 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1119 transitions. Word has length 20 [2021-07-13 19:39:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1119 transitions. [2021-07-13 19:39:37,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1119 transitions. [2021-07-13 19:39:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:37,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:37,022 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:37,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:37,222 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -425261269, now seen corresponding path program 60 times [2021-07-13 19:39:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:37,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64449305] [2021-07-13 19:39:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:37,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64449305] [2021-07-13 19:39:37,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64449305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578503956] [2021-07-13 19:39:37,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:37,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:37,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578503956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:37,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:37,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015676419] [2021-07-13 19:39:37,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:37,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:37,477 INFO L87 Difference]: Start difference. First operand 350 states and 1119 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:37,880 INFO L93 Difference]: Finished difference Result 690 states and 2044 transitions. [2021-07-13 19:39:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:37,881 INFO L225 Difference]: With dead ends: 690 [2021-07-13 19:39:37,881 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 19:39:37,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 19:39:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 347. [2021-07-13 19:39:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2023121387283235) internal successors, (1108), 346 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-07-13 19:39:37,887 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-07-13 19:39:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:37,888 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-07-13 19:39:37,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-07-13 19:39:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:37,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:37,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-13 19:39:38,089 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2098424725, now seen corresponding path program 61 times [2021-07-13 19:39:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314876425] [2021-07-13 19:39:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:38,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314876425] [2021-07-13 19:39:38,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314876425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517773023] [2021-07-13 19:39:38,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517773023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:38,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:38,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781503081] [2021-07-13 19:39:38,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:38,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:38,386 INFO L87 Difference]: Start difference. First operand 347 states and 1108 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:38,746 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2021-07-13 19:39:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:38,757 INFO L225 Difference]: With dead ends: 627 [2021-07-13 19:39:38,757 INFO L226 Difference]: Without dead ends: 627 [2021-07-13 19:39:38,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-13 19:39:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 354. [2021-07-13 19:39:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.215297450424929) internal successors, (1135), 353 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1135 transitions. [2021-07-13 19:39:38,767 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1135 transitions. Word has length 20 [2021-07-13 19:39:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1135 transitions. [2021-07-13 19:39:38,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1135 transitions. [2021-07-13 19:39:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:38,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:38,767 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:38,981 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 702634849, now seen corresponding path program 62 times [2021-07-13 19:39:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325421854] [2021-07-13 19:39:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325421854] [2021-07-13 19:39:39,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325421854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205870642] [2021-07-13 19:39:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205870642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:39,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699128797] [2021-07-13 19:39:39,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:39,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:39,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:39,259 INFO L87 Difference]: Start difference. First operand 354 states and 1135 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:39,802 INFO L93 Difference]: Finished difference Result 633 states and 1905 transitions. [2021-07-13 19:39:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:39,803 INFO L225 Difference]: With dead ends: 633 [2021-07-13 19:39:39,803 INFO L226 Difference]: Without dead ends: 627 [2021-07-13 19:39:39,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-13 19:39:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 351. [2021-07-13 19:39:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.2114285714285713) internal successors, (1124), 350 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1124 transitions. [2021-07-13 19:39:39,809 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1124 transitions. Word has length 20 [2021-07-13 19:39:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:39,809 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1124 transitions. [2021-07-13 19:39:39,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1124 transitions. [2021-07-13 19:39:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:39,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:39,810 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-07-13 19:39:40,017 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1240490427, now seen corresponding path program 63 times [2021-07-13 19:39:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091130348] [2021-07-13 19:39:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091130348] [2021-07-13 19:39:40,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091130348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511329370] [2021-07-13 19:39:40,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511329370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617632372] [2021-07-13 19:39:40,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:40,310 INFO L87 Difference]: Start difference. First operand 351 states and 1124 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,693 INFO L93 Difference]: Finished difference Result 597 states and 1823 transitions. [2021-07-13 19:39:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,694 INFO L225 Difference]: With dead ends: 597 [2021-07-13 19:39:40,694 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 19:39:40,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 19:39:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 348. [2021-07-13 19:39:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.207492795389049) internal successors, (1113), 347 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-07-13 19:39:40,700 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-07-13 19:39:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,700 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-07-13 19:39:40,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-07-13 19:39:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:40,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,700 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-07-13 19:39:40,901 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -279847627, now seen corresponding path program 64 times [2021-07-13 19:39:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488763169] [2021-07-13 19:39:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488763169] [2021-07-13 19:39:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488763169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098806314] [2021-07-13 19:39:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098806314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:41,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731851954] [2021-07-13 19:39:41,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:41,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:41,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:41,169 INFO L87 Difference]: Start difference. First operand 348 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:41,868 INFO L93 Difference]: Finished difference Result 702 states and 2083 transitions. [2021-07-13 19:39:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:41,869 INFO L225 Difference]: With dead ends: 702 [2021-07-13 19:39:41,869 INFO L226 Difference]: Without dead ends: 702 [2021-07-13 19:39:41,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 665.9ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-13 19:39:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-07-13 19:39:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.2366197183098593) internal successors, (1149), 355 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1149 transitions. [2021-07-13 19:39:41,875 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1149 transitions. Word has length 20 [2021-07-13 19:39:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:41,876 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1149 transitions. [2021-07-13 19:39:41,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1149 transitions. [2021-07-13 19:39:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:41,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:41,876 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-07-13 19:39:42,077 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1773755349, now seen corresponding path program 65 times [2021-07-13 19:39:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255426746] [2021-07-13 19:39:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255426746] [2021-07-13 19:39:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255426746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655071734] [2021-07-13 19:39:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:42,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655071734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:42,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759995469] [2021-07-13 19:39:42,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:42,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:42,363 INFO L87 Difference]: Start difference. First operand 356 states and 1149 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,999 INFO L93 Difference]: Finished difference Result 708 states and 2084 transitions. [2021-07-13 19:39:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:43,000 INFO L225 Difference]: With dead ends: 708 [2021-07-13 19:39:43,000 INFO L226 Difference]: Without dead ends: 702 [2021-07-13 19:39:43,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 666.6ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-13 19:39:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 359. [2021-07-13 19:39:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.2150837988826817) internal successors, (1151), 358 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1151 transitions. [2021-07-13 19:39:43,006 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1151 transitions. Word has length 20 [2021-07-13 19:39:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:43,006 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1151 transitions. [2021-07-13 19:39:43,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1151 transitions. [2021-07-13 19:39:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:43,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:43,007 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:43,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,208 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash 471552811, now seen corresponding path program 66 times [2021-07-13 19:39:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542911459] [2021-07-13 19:39:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542911459] [2021-07-13 19:39:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542911459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111857324] [2021-07-13 19:39:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:43,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111857324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:43,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626753590] [2021-07-13 19:39:43,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:43,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:43,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:43,488 INFO L87 Difference]: Start difference. First operand 359 states and 1151 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:43,832 INFO L93 Difference]: Finished difference Result 670 states and 2004 transitions. [2021-07-13 19:39:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:43,834 INFO L225 Difference]: With dead ends: 670 [2021-07-13 19:39:43,834 INFO L226 Difference]: Without dead ends: 670 [2021-07-13 19:39:43,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-07-13 19:39:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 352. [2021-07-13 19:39:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.2279202279202277) internal successors, (1133), 351 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1133 transitions. [2021-07-13 19:39:43,839 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1133 transitions. Word has length 20 [2021-07-13 19:39:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:43,839 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1133 transitions. [2021-07-13 19:39:43,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1133 transitions. [2021-07-13 19:39:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:43,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:43,840 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-07-13 19:39:44,041 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1763895211, now seen corresponding path program 67 times [2021-07-13 19:39:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671544190] [2021-07-13 19:39:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671544190] [2021-07-13 19:39:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671544190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613986476] [2021-07-13 19:39:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613986476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:44,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114539900] [2021-07-13 19:39:44,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:44,321 INFO L87 Difference]: Start difference. First operand 352 states and 1133 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:44,680 INFO L93 Difference]: Finished difference Result 633 states and 1922 transitions. [2021-07-13 19:39:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:44,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:44,681 INFO L225 Difference]: With dead ends: 633 [2021-07-13 19:39:44,681 INFO L226 Difference]: Without dead ends: 633 [2021-07-13 19:39:44,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-13 19:39:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 349. [2021-07-13 19:39:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.2126436781609193) internal successors, (1118), 348 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1118 transitions. [2021-07-13 19:39:44,687 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1118 transitions. Word has length 20 [2021-07-13 19:39:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:44,687 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1118 transitions. [2021-07-13 19:39:44,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1118 transitions. [2021-07-13 19:39:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:44,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:44,688 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,901 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 492289339, now seen corresponding path program 68 times [2021-07-13 19:39:44,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176220969] [2021-07-13 19:39:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176220969] [2021-07-13 19:39:44,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176220969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578355138] [2021-07-13 19:39:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578355138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539827044] [2021-07-13 19:39:45,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:45,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:45,232 INFO L87 Difference]: Start difference. First operand 349 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,017 INFO L93 Difference]: Finished difference Result 670 states and 1996 transitions. [2021-07-13 19:39:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,018 INFO L225 Difference]: With dead ends: 670 [2021-07-13 19:39:46,018 INFO L226 Difference]: Without dead ends: 664 [2021-07-13 19:39:46,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-07-13 19:39:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 359. [2021-07-13 19:39:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1983240223463687) internal successors, (1145), 358 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1145 transitions. [2021-07-13 19:39:46,026 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1145 transitions. Word has length 20 [2021-07-13 19:39:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,026 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1145 transitions. [2021-07-13 19:39:46,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1145 transitions. [2021-07-13 19:39:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:46,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,027 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:46,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-13 19:39:46,227 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1423134587, now seen corresponding path program 69 times [2021-07-13 19:39:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:46,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050410399] [2021-07-13 19:39:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050410399] [2021-07-13 19:39:46,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050410399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771301421] [2021-07-13 19:39:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:46,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771301421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452045271] [2021-07-13 19:39:46,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:46,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:46,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:46,523 INFO L87 Difference]: Start difference. First operand 359 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:47,062 INFO L93 Difference]: Finished difference Result 647 states and 1957 transitions. [2021-07-13 19:39:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:47,063 INFO L225 Difference]: With dead ends: 647 [2021-07-13 19:39:47,063 INFO L226 Difference]: Without dead ends: 647 [2021-07-13 19:39:47,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-13 19:39:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 348. [2021-07-13 19:39:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.207492795389049) internal successors, (1113), 347 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-07-13 19:39:47,069 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-07-13 19:39:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:47,069 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-07-13 19:39:47,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-07-13 19:39:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:47,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:47,069 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-07-13 19:39:47,270 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1526568277, now seen corresponding path program 70 times [2021-07-13 19:39:47,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876256771] [2021-07-13 19:39:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876256771] [2021-07-13 19:39:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876256771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578404930] [2021-07-13 19:39:47,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:47,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578404930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:47,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035572977] [2021-07-13 19:39:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:47,547 INFO L87 Difference]: Start difference. First operand 348 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:47,870 INFO L93 Difference]: Finished difference Result 589 states and 1801 transitions. [2021-07-13 19:39:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:47,871 INFO L225 Difference]: With dead ends: 589 [2021-07-13 19:39:47,871 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 19:39:47,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 19:39:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-07-13 19:39:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.2034383954154726) internal successors, (1118), 349 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1118 transitions. [2021-07-13 19:39:47,876 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1118 transitions. Word has length 20 [2021-07-13 19:39:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:47,876 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1118 transitions. [2021-07-13 19:39:47,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1118 transitions. [2021-07-13 19:39:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:47,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:47,877 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:48,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:48,077 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:48,078 INFO L82 PathProgramCache]: Analyzing trace with hash -775167839, now seen corresponding path program 71 times [2021-07-13 19:39:48,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:48,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534709939] [2021-07-13 19:39:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534709939] [2021-07-13 19:39:48,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534709939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891513951] [2021-07-13 19:39:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:48,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891513951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:48,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:48,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270848044] [2021-07-13 19:39:48,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:48,356 INFO L87 Difference]: Start difference. First operand 350 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,970 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 19:39:49,100 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 19:39:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:49,109 INFO L93 Difference]: Finished difference Result 614 states and 1853 transitions. [2021-07-13 19:39:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:49,110 INFO L225 Difference]: With dead ends: 614 [2021-07-13 19:39:49,110 INFO L226 Difference]: Without dead ends: 608 [2021-07-13 19:39:49,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 784.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-13 19:39:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 360. [2021-07-13 19:39:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1894150417827296) internal successors, (1145), 359 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1145 transitions. [2021-07-13 19:39:49,119 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1145 transitions. Word has length 20 [2021-07-13 19:39:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:49,119 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1145 transitions. [2021-07-13 19:39:49,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1145 transitions. [2021-07-13 19:39:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:49,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:49,119 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:49,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,320 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1604375531, now seen corresponding path program 72 times [2021-07-13 19:39:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:49,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355220156] [2021-07-13 19:39:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:49,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355220156] [2021-07-13 19:39:49,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355220156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662399345] [2021-07-13 19:39:49,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662399345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805174004] [2021-07-13 19:39:49,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:49,591 INFO L87 Difference]: Start difference. First operand 360 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:50,011 INFO L93 Difference]: Finished difference Result 585 states and 1799 transitions. [2021-07-13 19:39:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:50,012 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:39:50,012 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 19:39:50,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 19:39:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 347. [2021-07-13 19:39:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2023121387283235) internal successors, (1108), 346 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-07-13 19:39:50,017 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-07-13 19:39:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:50,018 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-07-13 19:39:50,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-07-13 19:39:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:50,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:50,018 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:50,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-13 19:39:50,219 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -304735173, now seen corresponding path program 73 times [2021-07-13 19:39:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:50,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372441978] [2021-07-13 19:39:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:50,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372441978] [2021-07-13 19:39:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372441978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395179716] [2021-07-13 19:39:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395179716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:50,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:50,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569741732] [2021-07-13 19:39:50,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:50,500 INFO L87 Difference]: Start difference. First operand 347 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:50,895 INFO L93 Difference]: Finished difference Result 612 states and 1839 transitions. [2021-07-13 19:39:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:50,896 INFO L225 Difference]: With dead ends: 612 [2021-07-13 19:39:50,896 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 19:39:50,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 19:39:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 349. [2021-07-13 19:39:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1982758620689653) internal successors, (1113), 348 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-07-13 19:39:50,902 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-07-13 19:39:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:50,902 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-07-13 19:39:50,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-07-13 19:39:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:50,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:50,903 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,103 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1707620929, now seen corresponding path program 74 times [2021-07-13 19:39:51,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796661431] [2021-07-13 19:39:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796661431] [2021-07-13 19:39:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796661431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800392096] [2021-07-13 19:39:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800392096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:51,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242791845] [2021-07-13 19:39:51,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:51,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:51,403 INFO L87 Difference]: Start difference. First operand 349 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:51,781 INFO L93 Difference]: Finished difference Result 571 states and 1753 transitions. [2021-07-13 19:39:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:51,783 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:39:51,783 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 19:39:51,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 19:39:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-07-13 19:39:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1942857142857144) internal successors, (1118), 350 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1118 transitions. [2021-07-13 19:39:51,788 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1118 transitions. Word has length 20 [2021-07-13 19:39:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:51,788 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1118 transitions. [2021-07-13 19:39:51,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1118 transitions. [2021-07-13 19:39:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:51,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:51,788 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-07-13 19:39:51,989 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1835945929, now seen corresponding path program 75 times [2021-07-13 19:39:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951428034] [2021-07-13 19:39:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951428034] [2021-07-13 19:39:52,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951428034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275837202] [2021-07-13 19:39:52,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:52,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:52,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275837202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:52,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40997841] [2021-07-13 19:39:52,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:52,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:52,251 INFO L87 Difference]: Start difference. First operand 351 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:52,932 INFO L93 Difference]: Finished difference Result 594 states and 1798 transitions. [2021-07-13 19:39:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:52,933 INFO L225 Difference]: With dead ends: 594 [2021-07-13 19:39:52,933 INFO L226 Difference]: Without dead ends: 588 [2021-07-13 19:39:52,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:39:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-13 19:39:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 361. [2021-07-13 19:39:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1805555555555554) internal successors, (1145), 360 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1145 transitions. [2021-07-13 19:39:52,938 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1145 transitions. Word has length 20 [2021-07-13 19:39:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:52,938 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1145 transitions. [2021-07-13 19:39:52,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1145 transitions. [2021-07-13 19:39:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:52,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:52,939 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:53,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-07-13 19:39:53,140 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash 543597441, now seen corresponding path program 76 times [2021-07-13 19:39:53,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:53,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074714186] [2021-07-13 19:39:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074714186] [2021-07-13 19:39:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074714186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510342038] [2021-07-13 19:39:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510342038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:53,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:53,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282344576] [2021-07-13 19:39:53,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:53,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:53,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:53,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:53,413 INFO L87 Difference]: Start difference. First operand 361 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:53,827 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-07-13 19:39:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:53,828 INFO L225 Difference]: With dead ends: 565 [2021-07-13 19:39:53,828 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:39:53,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:39:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 349. [2021-07-13 19:39:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1982758620689653) internal successors, (1113), 348 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-07-13 19:39:53,833 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-07-13 19:39:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:53,833 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-07-13 19:39:53,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-07-13 19:39:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:53,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:53,834 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,035 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,035 INFO L82 PathProgramCache]: Analyzing trace with hash -942811430, now seen corresponding path program 77 times [2021-07-13 19:39:54,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030308072] [2021-07-13 19:39:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030308072] [2021-07-13 19:39:54,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030308072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92996021] [2021-07-13 19:39:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:54,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:54,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:54,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,182 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:39:54,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:54,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:39:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92996021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:54,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:39:54,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350213681] [2021-07-13 19:39:54,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:54,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:54,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:54,225 INFO L87 Difference]: Start difference. First operand 349 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,407 INFO L93 Difference]: Finished difference Result 493 states and 1515 transitions. [2021-07-13 19:39:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,409 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:39:54,409 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:39:54,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:39:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 339. [2021-07-13 19:39:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-13 19:39:54,413 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-13 19:39:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,413 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-13 19:39:54,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-13 19:39:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:54,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,414 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,614 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-07-13 19:39:54,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191949062] [2021-07-13 19:39:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191949062] [2021-07-13 19:39:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191949062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490042552] [2021-07-13 19:39:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:54,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:54,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:54,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:54,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:54,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-13 19:39:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490042552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:54,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017078708] [2021-07-13 19:39:54,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:54,836 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,952 INFO L93 Difference]: Finished difference Result 438 states and 1322 transitions. [2021-07-13 19:39:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,953 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:39:54,953 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:39:54,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:39:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-07-13 19:39:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-07-13 19:39:54,958 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-07-13 19:39:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,958 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-07-13 19:39:54,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-07-13 19:39:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:54,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:55,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,159 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-07-13 19:39:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:55,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954124181] [2021-07-13 19:39:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:55,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954124181] [2021-07-13 19:39:55,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954124181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847178075] [2021-07-13 19:39:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:55,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:55,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,332 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:55,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:55,332 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-13 19:39:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847178075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:55,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978163942] [2021-07-13 19:39:55,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:55,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:55,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:55,356 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:55,482 INFO L93 Difference]: Finished difference Result 490 states and 1443 transitions. [2021-07-13 19:39:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:55,483 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:39:55,483 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:39:55,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:39:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-07-13 19:39:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1481481481481484) internal successors, (1105), 351 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1105 transitions. [2021-07-13 19:39:55,492 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1105 transitions. Word has length 20 [2021-07-13 19:39:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:55,492 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1105 transitions. [2021-07-13 19:39:55,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1105 transitions. [2021-07-13 19:39:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:55,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:55,492 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:55,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,693 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-07-13 19:39:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277493911] [2021-07-13 19:39:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:55,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277493911] [2021-07-13 19:39:55,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277493911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996261358] [2021-07-13 19:39:55,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:55,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:55,855 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:39:55,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:55,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-13 19:39:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996261358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746412964] [2021-07-13 19:39:55,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:55,876 INFO L87 Difference]: Start difference. First operand 352 states and 1105 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,007 INFO L93 Difference]: Finished difference Result 447 states and 1340 transitions. [2021-07-13 19:39:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,008 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:39:56,008 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:39:56,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:39:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 344. [2021-07-13 19:39:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.151603498542274) internal successors, (1081), 343 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1081 transitions. [2021-07-13 19:39:56,013 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1081 transitions. Word has length 20 [2021-07-13 19:39:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,013 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1081 transitions. [2021-07-13 19:39:56,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1081 transitions. [2021-07-13 19:39:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:56,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,014 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,214 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-07-13 19:39:56,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405450242] [2021-07-13 19:39:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405450242] [2021-07-13 19:39:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405450242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072678422] [2021-07-13 19:39:56,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072678422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:56,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159806017] [2021-07-13 19:39:56,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:56,444 INFO L87 Difference]: Start difference. First operand 344 states and 1081 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,590 INFO L93 Difference]: Finished difference Result 416 states and 1256 transitions. [2021-07-13 19:39:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,591 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:39:56,591 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:39:56,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:39:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-07-13 19:39:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.160458452722063) internal successors, (1103), 349 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1103 transitions. [2021-07-13 19:39:56,596 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1103 transitions. Word has length 20 [2021-07-13 19:39:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,596 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1103 transitions. [2021-07-13 19:39:56,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1103 transitions. [2021-07-13 19:39:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:56,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,597 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,797 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-07-13 19:39:56,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29285397] [2021-07-13 19:39:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29285397] [2021-07-13 19:39:56,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29285397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173343228] [2021-07-13 19:39:56,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:56,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173343228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:57,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781784060] [2021-07-13 19:39:57,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:57,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:57,014 INFO L87 Difference]: Start difference. First operand 350 states and 1103 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,227 INFO L93 Difference]: Finished difference Result 422 states and 1263 transitions. [2021-07-13 19:39:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,228 INFO L225 Difference]: With dead ends: 422 [2021-07-13 19:39:57,228 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:39:57,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:39:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-07-13 19:39:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1560693641618496) internal successors, (1092), 346 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1092 transitions. [2021-07-13 19:39:57,233 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1092 transitions. Word has length 20 [2021-07-13 19:39:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,233 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1092 transitions. [2021-07-13 19:39:57,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1092 transitions. [2021-07-13 19:39:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:57,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:57,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-07-13 19:39:57,434 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-07-13 19:39:57,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:57,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574850492] [2021-07-13 19:39:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:57,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574850492] [2021-07-13 19:39:57,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574850492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89025012] [2021-07-13 19:39:57,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89025012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659791021] [2021-07-13 19:39:57,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:57,670 INFO L87 Difference]: Start difference. First operand 347 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,868 INFO L93 Difference]: Finished difference Result 380 states and 1168 transitions. [2021-07-13 19:39:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:57,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,869 INFO L225 Difference]: With dead ends: 380 [2021-07-13 19:39:57,869 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:39:57,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:39:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 339. [2021-07-13 19:39:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-13 19:39:57,873 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-13 19:39:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,873 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-13 19:39:57,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-13 19:39:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:57,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,874 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-07-13 19:39:58,074 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-07-13 19:39:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804001424] [2021-07-13 19:39:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804001424] [2021-07-13 19:39:58,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804001424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587543257] [2021-07-13 19:39:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:58,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:58,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,241 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-13 19:39:58,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:58,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:58,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:58,252 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:39:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587543257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:58,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:39:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015063089] [2021-07-13 19:39:58,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:58,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:58,311 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:58,551 INFO L93 Difference]: Finished difference Result 550 states and 1646 transitions. [2021-07-13 19:39:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:58,552 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:39:58,552 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:39:58,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:39:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-07-13 19:39:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-13 19:39:58,557 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-13 19:39:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:58,557 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-13 19:39:58,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-13 19:39:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:58,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:58,558 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-07-13 19:39:58,758 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-07-13 19:39:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983634671] [2021-07-13 19:39:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983634671] [2021-07-13 19:39:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983634671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971293789] [2021-07-13 19:39:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:58,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:58,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:58,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:58,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,957 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:39:58,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:58,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:39:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971293789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431257495] [2021-07-13 19:39:59,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:59,004 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,237 INFO L93 Difference]: Finished difference Result 591 states and 1730 transitions. [2021-07-13 19:39:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,239 INFO L225 Difference]: With dead ends: 591 [2021-07-13 19:39:59,239 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:39:59,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:39:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 351. [2021-07-13 19:39:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1685714285714286) internal successors, (1109), 350 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1109 transitions. [2021-07-13 19:39:59,244 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1109 transitions. Word has length 20 [2021-07-13 19:39:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,244 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1109 transitions. [2021-07-13 19:39:59,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1109 transitions. [2021-07-13 19:39:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:59,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,245 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,445 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-07-13 19:39:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870538537] [2021-07-13 19:39:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:59,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870538537] [2021-07-13 19:39:59,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870538537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865961088] [2021-07-13 19:39:59,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:59,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:59,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:59,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:39:59,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:59,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,666 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:39:59,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:59,666 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:39:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865961088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:59,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881530739] [2021-07-13 19:39:59,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:59,712 INFO L87 Difference]: Start difference. First operand 351 states and 1109 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,881 INFO L93 Difference]: Finished difference Result 643 states and 1851 transitions. [2021-07-13 19:39:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:59,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:39:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,882 INFO L225 Difference]: With dead ends: 643 [2021-07-13 19:39:59,882 INFO L226 Difference]: Without dead ends: 643 [2021-07-13 19:39:59,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-13 19:39:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 357. [2021-07-13 19:39:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1853932584269664) internal successors, (1134), 356 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1134 transitions. [2021-07-13 19:39:59,887 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1134 transitions. Word has length 20 [2021-07-13 19:39:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,888 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1134 transitions. [2021-07-13 19:39:59,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1134 transitions. [2021-07-13 19:39:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:59,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:00,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,089 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-07-13 19:40:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:00,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978302539] [2021-07-13 19:40:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978302539] [2021-07-13 19:40:00,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978302539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094700957] [2021-07-13 19:40:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:00,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:00,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:00,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,288 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-13 19:40:00,288 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:40:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:00,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:00,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,311 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:00,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:00,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:40:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094700957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114576800] [2021-07-13 19:40:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:00,353 INFO L87 Difference]: Start difference. First operand 357 states and 1134 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:00,519 INFO L93 Difference]: Finished difference Result 600 states and 1742 transitions. [2021-07-13 19:40:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:00,520 INFO L225 Difference]: With dead ends: 600 [2021-07-13 19:40:00,520 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 19:40:00,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 19:40:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 355. [2021-07-13 19:40:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.172316384180791) internal successors, (1123), 354 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1123 transitions. [2021-07-13 19:40:00,525 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1123 transitions. Word has length 20 [2021-07-13 19:40:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:00,525 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1123 transitions. [2021-07-13 19:40:00,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1123 transitions. [2021-07-13 19:40:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:00,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:00,526 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:00,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,736 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-07-13 19:40:00,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:00,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254844969] [2021-07-13 19:40:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:00,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254844969] [2021-07-13 19:40:00,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254844969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054298907] [2021-07-13 19:40:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:00,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:00,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:00,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,893 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-13 19:40:00,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:00,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-13 19:40:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054298907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:40:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000992731] [2021-07-13 19:40:00,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:00,948 INFO L87 Difference]: Start difference. First operand 355 states and 1123 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:01,176 INFO L93 Difference]: Finished difference Result 483 states and 1462 transitions. [2021-07-13 19:40:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:01,177 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:40:01,177 INFO L226 Difference]: Without dead ends: 421 [2021-07-13 19:40:01,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-13 19:40:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 349. [2021-07-13 19:40:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-07-13 19:40:01,182 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-07-13 19:40:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:01,182 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-07-13 19:40:01,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-07-13 19:40:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:01,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:01,182 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:01,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,385 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-07-13 19:40:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:01,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408571987] [2021-07-13 19:40:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408571987] [2021-07-13 19:40:01,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408571987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98422773] [2021-07-13 19:40:01,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:01,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:01,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,595 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:40:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:01,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:01,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:01,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98422773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:01,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:40:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375656565] [2021-07-13 19:40:01,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:40:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:40:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:01,661 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:01,868 INFO L93 Difference]: Finished difference Result 544 states and 1608 transitions. [2021-07-13 19:40:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:01,869 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:40:01,869 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:40:01,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:40:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 339. [2021-07-13 19:40:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1449704142011834) internal successors, (1063), 338 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1063 transitions. [2021-07-13 19:40:01,874 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1063 transitions. Word has length 20 [2021-07-13 19:40:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:01,874 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1063 transitions. [2021-07-13 19:40:01,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1063 transitions. [2021-07-13 19:40:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:01,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:01,875 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:02,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-07-13 19:40:02,075 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-07-13 19:40:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:02,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381249122] [2021-07-13 19:40:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381249122] [2021-07-13 19:40:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381249122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129318157] [2021-07-13 19:40:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:02,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:02,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:02,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,313 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-13 19:40:02,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:02,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,350 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2021-07-13 19:40:02,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:02,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:02,373 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-13 19:40:02,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:02,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:40:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129318157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:02,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:02,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023577237] [2021-07-13 19:40:02,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:02,451 INFO L87 Difference]: Start difference. First operand 339 states and 1063 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:02,691 INFO L93 Difference]: Finished difference Result 540 states and 1592 transitions. [2021-07-13 19:40:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:02,692 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:40:02,693 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:40:02,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:40:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 342. [2021-07-13 19:40:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.161290322580645) internal successors, (1078), 341 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1078 transitions. [2021-07-13 19:40:02,698 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1078 transitions. Word has length 20 [2021-07-13 19:40:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:02,698 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1078 transitions. [2021-07-13 19:40:02,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1078 transitions. [2021-07-13 19:40:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:02,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:02,698 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:02,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-07-13 19:40:02,899 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-07-13 19:40:02,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:02,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184892164] [2021-07-13 19:40:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:02,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184892164] [2021-07-13 19:40:02,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184892164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765111865] [2021-07-13 19:40:02,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:03,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:03,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:03,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,117 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-07-13 19:40:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:03,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,149 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-07-13 19:40:03,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:03,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,170 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:03,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:03,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-13 19:40:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765111865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:03,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:03,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004417412] [2021-07-13 19:40:03,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:03,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:03,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:03,246 INFO L87 Difference]: Start difference. First operand 342 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:03,453 INFO L93 Difference]: Finished difference Result 478 states and 1449 transitions. [2021-07-13 19:40:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:03,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:03,455 INFO L225 Difference]: With dead ends: 478 [2021-07-13 19:40:03,455 INFO L226 Difference]: Without dead ends: 478 [2021-07-13 19:40:03,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-13 19:40:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 333. [2021-07-13 19:40:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1295180722891565) internal successors, (1039), 332 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1039 transitions. [2021-07-13 19:40:03,459 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1039 transitions. Word has length 20 [2021-07-13 19:40:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:03,459 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1039 transitions. [2021-07-13 19:40:03,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1039 transitions. [2021-07-13 19:40:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:03,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:03,460 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:03,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable966 [2021-07-13 19:40:03,661 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-07-13 19:40:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433245043] [2021-07-13 19:40:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433245043] [2021-07-13 19:40:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433245043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378144936] [2021-07-13 19:40:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:03,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:03,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,881 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-07-13 19:40:03,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:03,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:03,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:03,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,920 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:03,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:03,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-13 19:40:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378144936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:03,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:03,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829353963] [2021-07-13 19:40:03,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:03,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:03,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:03,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:04,000 INFO L87 Difference]: Start difference. First operand 333 states and 1039 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:04,223 INFO L93 Difference]: Finished difference Result 588 states and 1733 transitions. [2021-07-13 19:40:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:04,224 INFO L225 Difference]: With dead ends: 588 [2021-07-13 19:40:04,224 INFO L226 Difference]: Without dead ends: 588 [2021-07-13 19:40:04,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-13 19:40:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 341. [2021-07-13 19:40:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.161764705882353) internal successors, (1075), 340 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1075 transitions. [2021-07-13 19:40:04,230 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1075 transitions. Word has length 20 [2021-07-13 19:40:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:04,230 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1075 transitions. [2021-07-13 19:40:04,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1075 transitions. [2021-07-13 19:40:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:04,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:04,230 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:04,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,431 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-07-13 19:40:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:04,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758820101] [2021-07-13 19:40:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:04,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758820101] [2021-07-13 19:40:04,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758820101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642353968] [2021-07-13 19:40:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:04,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:04,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:04,662 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-13 19:40:04,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:04,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:04,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:04,692 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:04,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:04,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-13 19:40:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642353968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:04,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:04,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140551351] [2021-07-13 19:40:04,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:04,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:04,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:04,778 INFO L87 Difference]: Start difference. First operand 341 states and 1075 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,003 INFO L93 Difference]: Finished difference Result 574 states and 1682 transitions. [2021-07-13 19:40:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,004 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:40:05,004 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:40:05,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:40:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-07-13 19:40:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.139941690962099) internal successors, (1077), 343 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1077 transitions. [2021-07-13 19:40:05,009 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1077 transitions. Word has length 20 [2021-07-13 19:40:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,010 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1077 transitions. [2021-07-13 19:40:05,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1077 transitions. [2021-07-13 19:40:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:05,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,010 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:05,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,211 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-07-13 19:40:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:05,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044113264] [2021-07-13 19:40:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:05,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044113264] [2021-07-13 19:40:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044113264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935675270] [2021-07-13 19:40:05,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:05,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:05,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,435 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-13 19:40:05,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:05,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:05,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,464 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:40:05,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:05,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:40:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935675270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:05,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:05,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550823508] [2021-07-13 19:40:05,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:05,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:05,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:05,561 INFO L87 Difference]: Start difference. First operand 344 states and 1077 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,900 INFO L93 Difference]: Finished difference Result 619 states and 1797 transitions. [2021-07-13 19:40:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,902 INFO L225 Difference]: With dead ends: 619 [2021-07-13 19:40:05,902 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 19:40:05,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 19:40:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 337. [2021-07-13 19:40:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1517857142857144) internal successors, (1059), 336 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1059 transitions. [2021-07-13 19:40:05,909 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1059 transitions. Word has length 20 [2021-07-13 19:40:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,909 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1059 transitions. [2021-07-13 19:40:05,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1059 transitions. [2021-07-13 19:40:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:05,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:06,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-13 19:40:06,110 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-07-13 19:40:06,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:06,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969125620] [2021-07-13 19:40:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969125620] [2021-07-13 19:40:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969125620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312632444] [2021-07-13 19:40:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:06,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:06,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:06,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:06,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,311 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-13 19:40:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:06,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:06,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:06,335 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:06,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:06,336 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-13 19:40:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312632444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635529676] [2021-07-13 19:40:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:06,415 INFO L87 Difference]: Start difference. First operand 337 states and 1059 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:06,631 INFO L93 Difference]: Finished difference Result 553 states and 1649 transitions. [2021-07-13 19:40:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:06,632 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:40:06,633 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:40:06,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:40:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 334. [2021-07-13 19:40:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.135135135135135) internal successors, (1044), 333 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1044 transitions. [2021-07-13 19:40:06,638 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1044 transitions. Word has length 20 [2021-07-13 19:40:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:06,638 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1044 transitions. [2021-07-13 19:40:06,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1044 transitions. [2021-07-13 19:40:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:06,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:06,638 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:06,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-07-13 19:40:06,855 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:06,856 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-07-13 19:40:06,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:06,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183090907] [2021-07-13 19:40:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183090907] [2021-07-13 19:40:06,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183090907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131137204] [2021-07-13 19:40:06,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:07,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:07,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,050 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-13 19:40:07,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:07,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:07,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:07,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-13 19:40:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131137204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305823657] [2021-07-13 19:40:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:07,148 INFO L87 Difference]: Start difference. First operand 334 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:07,424 INFO L93 Difference]: Finished difference Result 525 states and 1551 transitions. [2021-07-13 19:40:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:07,426 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:40:07,426 INFO L226 Difference]: Without dead ends: 519 [2021-07-13 19:40:07,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-13 19:40:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 344. [2021-07-13 19:40:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.122448979591837) internal successors, (1071), 343 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1071 transitions. [2021-07-13 19:40:07,430 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1071 transitions. Word has length 20 [2021-07-13 19:40:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:07,431 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1071 transitions. [2021-07-13 19:40:07,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1071 transitions. [2021-07-13 19:40:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:07,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:07,431 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:07,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,648 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-07-13 19:40:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:07,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027158703] [2021-07-13 19:40:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:07,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027158703] [2021-07-13 19:40:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027158703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201979246] [2021-07-13 19:40:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:07,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:07,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,845 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-13 19:40:07,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:07,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:07,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:07,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:07,857 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:40:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201979246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684267037] [2021-07-13 19:40:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:07,933 INFO L87 Difference]: Start difference. First operand 344 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,138 INFO L93 Difference]: Finished difference Result 496 states and 1497 transitions. [2021-07-13 19:40:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,139 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:40:08,139 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:40:08,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:40:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 331. [2021-07-13 19:40:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.124242424242424) internal successors, (1031), 330 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1031 transitions. [2021-07-13 19:40:08,144 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1031 transitions. Word has length 20 [2021-07-13 19:40:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,144 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1031 transitions. [2021-07-13 19:40:08,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1031 transitions. [2021-07-13 19:40:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:08,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,144 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:08,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-07-13 19:40:08,360 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-07-13 19:40:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:08,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681941104] [2021-07-13 19:40:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681941104] [2021-07-13 19:40:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681941104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707323498] [2021-07-13 19:40:08,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707323498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:08,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420448814] [2021-07-13 19:40:08,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:08,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:08,613 INFO L87 Difference]: Start difference. First operand 331 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,867 INFO L93 Difference]: Finished difference Result 417 states and 1251 transitions. [2021-07-13 19:40:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,868 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:40:08,868 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:40:08,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:40:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 338. [2021-07-13 19:40:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1394658753709197) internal successors, (1058), 337 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1058 transitions. [2021-07-13 19:40:08,875 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1058 transitions. Word has length 20 [2021-07-13 19:40:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,875 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1058 transitions. [2021-07-13 19:40:08,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1058 transitions. [2021-07-13 19:40:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:08,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,875 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-07-13 19:40:09,089 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-07-13 19:40:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:09,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240362388] [2021-07-13 19:40:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:09,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240362388] [2021-07-13 19:40:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240362388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120490394] [2021-07-13 19:40:09,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:09,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:09,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:09,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120490394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686954468] [2021-07-13 19:40:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:09,346 INFO L87 Difference]: Start difference. First operand 338 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:09,671 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-07-13 19:40:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:09,672 INFO L225 Difference]: With dead ends: 423 [2021-07-13 19:40:09,672 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:40:09,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:40:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 335. [2021-07-13 19:40:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1347305389221556) internal successors, (1047), 334 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1047 transitions. [2021-07-13 19:40:09,677 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1047 transitions. Word has length 20 [2021-07-13 19:40:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:09,677 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1047 transitions. [2021-07-13 19:40:09,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1047 transitions. [2021-07-13 19:40:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:09,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:09,678 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:09,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:09,879 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-07-13 19:40:09,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:09,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313958224] [2021-07-13 19:40:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:09,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313958224] [2021-07-13 19:40:09,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313958224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428134843] [2021-07-13 19:40:09,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:09,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:09,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428134843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:10,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:10,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408046783] [2021-07-13 19:40:10,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:10,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:10,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:10,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:10,148 INFO L87 Difference]: Start difference. First operand 335 states and 1047 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:10,422 INFO L93 Difference]: Finished difference Result 387 states and 1176 transitions. [2021-07-13 19:40:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:10,423 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:40:10,423 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 19:40:10,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 19:40:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 332. [2021-07-13 19:40:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1299093655589125) internal successors, (1036), 331 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-07-13 19:40:10,427 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-07-13 19:40:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:10,427 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-07-13 19:40:10,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-07-13 19:40:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:10,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:10,427 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:10,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,629 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-07-13 19:40:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:10,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536432061] [2021-07-13 19:40:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:10,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536432061] [2021-07-13 19:40:10,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536432061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068980464] [2021-07-13 19:40:10,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068980464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:10,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401260986] [2021-07-13 19:40:10,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:10,864 INFO L87 Difference]: Start difference. First operand 332 states and 1036 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,144 INFO L93 Difference]: Finished difference Result 501 states and 1461 transitions. [2021-07-13 19:40:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,145 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:40:11,145 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:40:11,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:40:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 340. [2021-07-13 19:40:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.162241887905605) internal successors, (1072), 339 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1072 transitions. [2021-07-13 19:40:11,150 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1072 transitions. Word has length 20 [2021-07-13 19:40:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,150 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1072 transitions. [2021-07-13 19:40:11,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1072 transitions. [2021-07-13 19:40:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:11,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,151 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:11,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:11,367 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-07-13 19:40:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:11,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242020303] [2021-07-13 19:40:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242020303] [2021-07-13 19:40:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242020303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938591109] [2021-07-13 19:40:11,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:11,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938591109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:11,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:11,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023502267] [2021-07-13 19:40:11,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:11,618 INFO L87 Difference]: Start difference. First operand 340 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,922 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-07-13 19:40:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,923 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:40:11,923 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:40:11,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:40:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 343. [2021-07-13 19:40:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1403508771929824) internal successors, (1074), 342 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1074 transitions. [2021-07-13 19:40:11,928 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1074 transitions. Word has length 20 [2021-07-13 19:40:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,928 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1074 transitions. [2021-07-13 19:40:11,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1074 transitions. [2021-07-13 19:40:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:11,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,929 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:12,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,129 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-07-13 19:40:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:12,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390269766] [2021-07-13 19:40:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390269766] [2021-07-13 19:40:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390269766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871629162] [2021-07-13 19:40:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871629162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158728397] [2021-07-13 19:40:12,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:12,391 INFO L87 Difference]: Start difference. First operand 343 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:12,645 INFO L93 Difference]: Finished difference Result 498 states and 1448 transitions. [2021-07-13 19:40:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:12,646 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:40:12,646 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:40:12,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:40:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 336. [2021-07-13 19:40:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.1522388059701494) internal successors, (1056), 335 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1056 transitions. [2021-07-13 19:40:12,651 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1056 transitions. Word has length 20 [2021-07-13 19:40:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:12,651 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1056 transitions. [2021-07-13 19:40:12,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1056 transitions. [2021-07-13 19:40:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:12,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:12,651 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:12,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-07-13 19:40:12,852 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-07-13 19:40:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:12,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143594012] [2021-07-13 19:40:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143594012] [2021-07-13 19:40:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143594012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781724046] [2021-07-13 19:40:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781724046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:13,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:13,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462434613] [2021-07-13 19:40:13,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:13,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:13,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:13,095 INFO L87 Difference]: Start difference. First operand 336 states and 1056 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:13,316 INFO L93 Difference]: Finished difference Result 432 states and 1300 transitions. [2021-07-13 19:40:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:13,317 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:40:13,317 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 19:40:13,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 19:40:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 333. [2021-07-13 19:40:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1355421686746987) internal successors, (1041), 332 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1041 transitions. [2021-07-13 19:40:13,321 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1041 transitions. Word has length 20 [2021-07-13 19:40:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:13,321 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1041 transitions. [2021-07-13 19:40:13,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1041 transitions. [2021-07-13 19:40:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:13,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:13,322 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:13,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:13,522 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-07-13 19:40:13,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:13,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703184637] [2021-07-13 19:40:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703184637] [2021-07-13 19:40:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703184637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012506275] [2021-07-13 19:40:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:13,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012506275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:13,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:13,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639007775] [2021-07-13 19:40:13,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:13,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:13,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:13,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:13,765 INFO L87 Difference]: Start difference. First operand 333 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:14,159 INFO L93 Difference]: Finished difference Result 475 states and 1389 transitions. [2021-07-13 19:40:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:14,160 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:40:14,160 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:40:14,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:40:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-07-13 19:40:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1228070175438596) internal successors, (1068), 342 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-07-13 19:40:14,165 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-07-13 19:40:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:14,165 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-07-13 19:40:14,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-07-13 19:40:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:14,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:14,166 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:14,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,367 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-07-13 19:40:14,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:14,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660050299] [2021-07-13 19:40:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:14,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660050299] [2021-07-13 19:40:14,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660050299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778889433] [2021-07-13 19:40:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:14,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:14,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778889433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:14,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301631] [2021-07-13 19:40:14,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:14,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:14,613 INFO L87 Difference]: Start difference. First operand 343 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:14,916 INFO L93 Difference]: Finished difference Result 446 states and 1335 transitions. [2021-07-13 19:40:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:14,917 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:40:14,917 INFO L226 Difference]: Without dead ends: 446 [2021-07-13 19:40:14,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-13 19:40:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-07-13 19:40:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1299093655589125) internal successors, (1036), 331 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-07-13 19:40:14,921 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-07-13 19:40:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-07-13 19:40:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-07-13 19:40:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:14,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:14,922 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:15,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:15,123 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-07-13 19:40:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:15,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849332235] [2021-07-13 19:40:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849332235] [2021-07-13 19:40:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849332235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808383861] [2021-07-13 19:40:15,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:15,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:15,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808383861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:15,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:15,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81477814] [2021-07-13 19:40:15,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:15,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:15,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:15,362 INFO L87 Difference]: Start difference. First operand 332 states and 1036 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:15,671 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-07-13 19:40:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:15,672 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:40:15,672 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:40:15,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:40:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 334. [2021-07-13 19:40:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.126126126126126) internal successors, (1041), 333 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-07-13 19:40:15,676 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-07-13 19:40:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:15,676 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-07-13 19:40:15,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-07-13 19:40:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:15,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:15,677 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:15,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-07-13 19:40:15,893 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:15,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-07-13 19:40:15,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:15,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782364726] [2021-07-13 19:40:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782364726] [2021-07-13 19:40:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782364726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450391764] [2021-07-13 19:40:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:16,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:16,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450391764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717492053] [2021-07-13 19:40:16,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:16,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:16,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:16,143 INFO L87 Difference]: Start difference. First operand 334 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:16,416 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-07-13 19:40:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:16,417 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:40:16,417 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:16,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 344. [2021-07-13 19:40:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1137026239067054) internal successors, (1068), 343 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-07-13 19:40:16,422 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-07-13 19:40:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:16,422 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-07-13 19:40:16,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-07-13 19:40:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:16,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:16,422 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:16,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-07-13 19:40:16,623 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-07-13 19:40:16,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:16,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899510577] [2021-07-13 19:40:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899510577] [2021-07-13 19:40:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899510577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685902086] [2021-07-13 19:40:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685902086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777689106] [2021-07-13 19:40:16,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:16,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:16,872 INFO L87 Difference]: Start difference. First operand 344 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:17,115 INFO L93 Difference]: Finished difference Result 374 states and 1150 transitions. [2021-07-13 19:40:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:17,116 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:40:17,116 INFO L226 Difference]: Without dead ends: 374 [2021-07-13 19:40:17,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-13 19:40:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 329. [2021-07-13 19:40:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1189024390243905) internal successors, (1023), 328 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1023 transitions. [2021-07-13 19:40:17,120 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1023 transitions. Word has length 20 [2021-07-13 19:40:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:17,120 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1023 transitions. [2021-07-13 19:40:17,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1023 transitions. [2021-07-13 19:40:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:17,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:17,121 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:17,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-07-13 19:40:17,321 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 657164802, now seen corresponding path program 110 times [2021-07-13 19:40:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:17,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977332736] [2021-07-13 19:40:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977332736] [2021-07-13 19:40:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977332736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987801575] [2021-07-13 19:40:17,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:17,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:17,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:17,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:17,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,561 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-07-13 19:40:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:17,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:17,585 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-13 19:40:17,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:17,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-07-13 19:40:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987801575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:17,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:40:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073704991] [2021-07-13 19:40:17,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:17,647 INFO L87 Difference]: Start difference. First operand 329 states and 1023 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:17,967 INFO L93 Difference]: Finished difference Result 421 states and 1257 transitions. [2021-07-13 19:40:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:17,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:17,968 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:40:17,968 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:40:17,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:40:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2021-07-13 19:40:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0865384615384617) internal successors, (963), 312 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 963 transitions. [2021-07-13 19:40:17,971 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 963 transitions. Word has length 20 [2021-07-13 19:40:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:17,972 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 963 transitions. [2021-07-13 19:40:17,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 963 transitions. [2021-07-13 19:40:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:17,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:17,972 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,173 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-07-13 19:40:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084447986] [2021-07-13 19:40:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084447986] [2021-07-13 19:40:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084447986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196197912] [2021-07-13 19:40:18,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:18,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:18,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:18,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:18,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,380 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-07-13 19:40:18,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:18,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:18,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:18,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,424 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-13 19:40:18,424 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:40:18,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:18,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-13 19:40:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196197912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:18,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:18,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:18,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770082100] [2021-07-13 19:40:18,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:18,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:18,471 INFO L87 Difference]: Start difference. First operand 313 states and 963 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:18,638 INFO L93 Difference]: Finished difference Result 488 states and 1442 transitions. [2021-07-13 19:40:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:18,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:18,639 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:40:18,640 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:40:18,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:40:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-07-13 19:40:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1097560975609757) internal successors, (1020), 328 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1020 transitions. [2021-07-13 19:40:18,644 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1020 transitions. Word has length 20 [2021-07-13 19:40:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:18,644 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1020 transitions. [2021-07-13 19:40:18,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1020 transitions. [2021-07-13 19:40:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:18,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:18,644 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:18,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,845 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-07-13 19:40:18,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:18,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629679706] [2021-07-13 19:40:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:18,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629679706] [2021-07-13 19:40:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629679706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968193788] [2021-07-13 19:40:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:18,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:18,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:18,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,017 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:40:19,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:19,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:19,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:19,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968193788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:19,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:19,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747057688] [2021-07-13 19:40:19,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:19,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:19,081 INFO L87 Difference]: Start difference. First operand 329 states and 1020 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:19,289 INFO L93 Difference]: Finished difference Result 540 states and 1563 transitions. [2021-07-13 19:40:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:19,290 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:40:19,290 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:40:19,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:40:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 335. [2021-07-13 19:40:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-13 19:40:19,296 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-13 19:40:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:19,296 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-13 19:40:19,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-13 19:40:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:19,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:19,297 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:19,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:19,498 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:19,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-07-13 19:40:19,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:19,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279520929] [2021-07-13 19:40:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:19,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279520929] [2021-07-13 19:40:19,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279520929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889729880] [2021-07-13 19:40:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:19,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:19,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:19,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:19,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,711 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-07-13 19:40:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:19,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,745 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:40:19,745 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-07-13 19:40:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:19,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:19,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,774 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:19,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:19,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:40:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889729880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:19,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:19,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963786230] [2021-07-13 19:40:19,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:19,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:19,817 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:19,972 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2021-07-13 19:40:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:19,973 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:40:19,973 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:40:19,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:40:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2021-07-13 19:40:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1144578313253013) internal successors, (1034), 332 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-07-13 19:40:19,977 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-07-13 19:40:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:19,977 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-07-13 19:40:19,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-07-13 19:40:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:19,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:19,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,178 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 114 times [2021-07-13 19:40:20,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636657866] [2021-07-13 19:40:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:20,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636657866] [2021-07-13 19:40:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636657866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135975549] [2021-07-13 19:40:20,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:20,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:20,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:20,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:20,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:20,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:20,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,396 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:40:20,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-07-13 19:40:20,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:20,396 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135975549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:20,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:40:20,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245059239] [2021-07-13 19:40:20,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:40:20,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:40:20,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:20,455 INFO L87 Difference]: Start difference. First operand 333 states and 1034 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:20,613 INFO L93 Difference]: Finished difference Result 600 states and 1752 transitions. [2021-07-13 19:40:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:20,614 INFO L225 Difference]: With dead ends: 600 [2021-07-13 19:40:20,615 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:40:20,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:40:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 339. [2021-07-13 19:40:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1301775147928996) internal successors, (1058), 338 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1058 transitions. [2021-07-13 19:40:20,619 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1058 transitions. Word has length 20 [2021-07-13 19:40:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:20,619 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1058 transitions. [2021-07-13 19:40:20,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1058 transitions. [2021-07-13 19:40:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:20,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:20,620 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,822 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 115 times [2021-07-13 19:40:20,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060312239] [2021-07-13 19:40:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:20,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060312239] [2021-07-13 19:40:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060312239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299476534] [2021-07-13 19:40:20,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:20,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,013 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-13 19:40:21,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-07-13 19:40:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:21,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:21,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,038 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:21,038 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-07-13 19:40:21,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:21,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:40:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299476534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:21,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:21,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185066562] [2021-07-13 19:40:21,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:21,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:21,112 INFO L87 Difference]: Start difference. First operand 339 states and 1058 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:21,280 INFO L93 Difference]: Finished difference Result 567 states and 1670 transitions. [2021-07-13 19:40:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:21,281 INFO L225 Difference]: With dead ends: 567 [2021-07-13 19:40:21,281 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:40:21,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:40:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 342. [2021-07-13 19:40:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1466275659824046) internal successors, (1073), 341 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1073 transitions. [2021-07-13 19:40:21,286 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1073 transitions. Word has length 20 [2021-07-13 19:40:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:21,286 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1073 transitions. [2021-07-13 19:40:21,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1073 transitions. [2021-07-13 19:40:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:21,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:21,287 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:21,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:21,487 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 116 times [2021-07-13 19:40:21,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:21,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385608960] [2021-07-13 19:40:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:21,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385608960] [2021-07-13 19:40:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385608960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931512399] [2021-07-13 19:40:21,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:21,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:21,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:21,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:21,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,670 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-07-13 19:40:21,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:21,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:21,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,697 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:40:21,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:21,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-07-13 19:40:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931512399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:21,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669546479] [2021-07-13 19:40:21,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:21,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:21,767 INFO L87 Difference]: Start difference. First operand 342 states and 1073 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:21,933 INFO L93 Difference]: Finished difference Result 534 states and 1593 transitions. [2021-07-13 19:40:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:21,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:21,934 INFO L225 Difference]: With dead ends: 534 [2021-07-13 19:40:21,934 INFO L226 Difference]: Without dead ends: 534 [2021-07-13 19:40:21,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-13 19:40:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 333. [2021-07-13 19:40:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1144578313253013) internal successors, (1034), 332 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-07-13 19:40:21,939 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-07-13 19:40:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:21,939 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-07-13 19:40:21,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-07-13 19:40:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:21,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:21,940 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:22,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-07-13 19:40:22,140 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 117 times [2021-07-13 19:40:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:22,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788799729] [2021-07-13 19:40:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788799729] [2021-07-13 19:40:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788799729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853800022] [2021-07-13 19:40:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:22,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:22,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:22,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,308 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:40:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:22,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:22,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:22,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853800022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:22,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:22,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015886635] [2021-07-13 19:40:22,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:22,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:22,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:22,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:22,403 INFO L87 Difference]: Start difference. First operand 333 states and 1034 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:22,635 INFO L93 Difference]: Finished difference Result 613 states and 1774 transitions. [2021-07-13 19:40:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:22,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:22,637 INFO L225 Difference]: With dead ends: 613 [2021-07-13 19:40:22,637 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 19:40:22,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 19:40:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 341. [2021-07-13 19:40:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1470588235294117) internal successors, (1070), 340 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1070 transitions. [2021-07-13 19:40:22,645 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1070 transitions. Word has length 20 [2021-07-13 19:40:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:22,645 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1070 transitions. [2021-07-13 19:40:22,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1070 transitions. [2021-07-13 19:40:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:22,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:22,646 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:22,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,846 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 118 times [2021-07-13 19:40:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:22,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880744607] [2021-07-13 19:40:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880744607] [2021-07-13 19:40:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880744607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753328349] [2021-07-13 19:40:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:23,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:23,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:23,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,069 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:40:23,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:23,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:23,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,093 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:23,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:23,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753328349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:23,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:23,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239146823] [2021-07-13 19:40:23,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:23,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:23,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:23,171 INFO L87 Difference]: Start difference. First operand 341 states and 1070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:23,368 INFO L93 Difference]: Finished difference Result 599 states and 1723 transitions. [2021-07-13 19:40:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:23,370 INFO L225 Difference]: With dead ends: 599 [2021-07-13 19:40:23,370 INFO L226 Difference]: Without dead ends: 593 [2021-07-13 19:40:23,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-13 19:40:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-07-13 19:40:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-13 19:40:23,377 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-13 19:40:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:23,377 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-13 19:40:23,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-13 19:40:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:23,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:23,378 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:23,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,579 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 119 times [2021-07-13 19:40:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:23,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388755110] [2021-07-13 19:40:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388755110] [2021-07-13 19:40:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388755110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759644418] [2021-07-13 19:40:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:23,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:23,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,764 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-07-13 19:40:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:23,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,789 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-13 19:40:23,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-07-13 19:40:23,789 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:40:23,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:23,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:40:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759644418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:23,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441252798] [2021-07-13 19:40:23,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:23,874 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,098 INFO L93 Difference]: Finished difference Result 624 states and 1812 transitions. [2021-07-13 19:40:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,099 INFO L225 Difference]: With dead ends: 624 [2021-07-13 19:40:24,099 INFO L226 Difference]: Without dead ends: 624 [2021-07-13 19:40:24,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-13 19:40:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 338. [2021-07-13 19:40:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.14540059347181) internal successors, (1060), 337 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1060 transitions. [2021-07-13 19:40:24,105 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1060 transitions. Word has length 20 [2021-07-13 19:40:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,105 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1060 transitions. [2021-07-13 19:40:24,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1060 transitions. [2021-07-13 19:40:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:24,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,105 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:24,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:24,306 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 120 times [2021-07-13 19:40:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:24,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678988409] [2021-07-13 19:40:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:24,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678988409] [2021-07-13 19:40:24,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678988409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523895176] [2021-07-13 19:40:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:24,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:24,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:24,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,539 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-07-13 19:40:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:24,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,578 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:40:24,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:24,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:24,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,604 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:24,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-07-13 19:40:24,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:24,605 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:40:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523895176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884672639] [2021-07-13 19:40:24,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:24,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:24,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:24,690 INFO L87 Difference]: Start difference. First operand 338 states and 1060 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,907 INFO L93 Difference]: Finished difference Result 593 states and 1745 transitions. [2021-07-13 19:40:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,908 INFO L225 Difference]: With dead ends: 593 [2021-07-13 19:40:24,908 INFO L226 Difference]: Without dead ends: 593 [2021-07-13 19:40:24,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-13 19:40:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-07-13 19:40:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-13 19:40:24,913 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-13 19:40:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,913 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-13 19:40:24,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-13 19:40:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:24,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,913 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:25,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:25,129 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 121 times [2021-07-13 19:40:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:25,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543729304] [2021-07-13 19:40:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543729304] [2021-07-13 19:40:25,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543729304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119560145] [2021-07-13 19:40:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:25,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,335 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-13 19:40:25,335 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-07-13 19:40:25,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:25,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,360 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:40:25,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:25,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:40:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119560145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:25,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400980995] [2021-07-13 19:40:25,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:25,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:25,439 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:25,648 INFO L93 Difference]: Finished difference Result 547 states and 1592 transitions. [2021-07-13 19:40:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:25,649 INFO L225 Difference]: With dead ends: 547 [2021-07-13 19:40:25,650 INFO L226 Difference]: Without dead ends: 541 [2021-07-13 19:40:25,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-07-13 19:40:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 339. [2021-07-13 19:40:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.133136094674556) internal successors, (1059), 338 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1059 transitions. [2021-07-13 19:40:25,654 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1059 transitions. Word has length 20 [2021-07-13 19:40:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:25,655 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1059 transitions. [2021-07-13 19:40:25,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1059 transitions. [2021-07-13 19:40:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:25,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:25,655 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:25,856 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 122 times [2021-07-13 19:40:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:25,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176172576] [2021-07-13 19:40:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:25,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176172576] [2021-07-13 19:40:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176172576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656834637] [2021-07-13 19:40:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:26,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:26,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:26,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,064 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-07-13 19:40:26,065 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-07-13 19:40:26,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:40:26,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:26,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,095 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:40:26,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:26,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-07-13 19:40:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656834637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:26,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:26,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579809306] [2021-07-13 19:40:26,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:26,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:26,177 INFO L87 Difference]: Start difference. First operand 339 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:26,365 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-07-13 19:40:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:26,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:26,367 INFO L225 Difference]: With dead ends: 530 [2021-07-13 19:40:26,367 INFO L226 Difference]: Without dead ends: 530 [2021-07-13 19:40:26,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-13 19:40:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 334. [2021-07-13 19:40:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.126126126126126) internal successors, (1041), 333 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-07-13 19:40:26,377 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-07-13 19:40:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:26,377 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-07-13 19:40:26,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-07-13 19:40:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:26,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:26,378 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:26,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:26,578 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 123 times [2021-07-13 19:40:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:26,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866975906] [2021-07-13 19:40:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866975906] [2021-07-13 19:40:26,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866975906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531332183] [2021-07-13 19:40:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:26,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:26,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:26,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:26,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,786 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:40:26,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:26,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:40:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531332183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:26,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:26,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776765751] [2021-07-13 19:40:26,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:26,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:26,817 INFO L87 Difference]: Start difference. First operand 334 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:26,975 INFO L93 Difference]: Finished difference Result 483 states and 1452 transitions. [2021-07-13 19:40:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:26,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:26,976 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:40:26,976 INFO L226 Difference]: Without dead ends: 483 [2021-07-13 19:40:26,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-13 19:40:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-07-13 19:40:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1160714285714284) internal successors, (1047), 336 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1047 transitions. [2021-07-13 19:40:26,980 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1047 transitions. Word has length 20 [2021-07-13 19:40:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:26,980 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1047 transitions. [2021-07-13 19:40:26,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1047 transitions. [2021-07-13 19:40:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:26,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:26,981 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1309 [2021-07-13 19:40:27,181 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 124 times [2021-07-13 19:40:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301789111] [2021-07-13 19:40:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301789111] [2021-07-13 19:40:27,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301789111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392793090] [2021-07-13 19:40:27,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:27,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:27,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:27,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:27,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:27,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,346 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:40:27,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:27,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:40:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392793090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:27,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:27,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232698273] [2021-07-13 19:40:27,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:27,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:27,406 INFO L87 Difference]: Start difference. First operand 337 states and 1047 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:27,623 INFO L93 Difference]: Finished difference Result 487 states and 1444 transitions. [2021-07-13 19:40:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:27,625 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:40:27,625 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:40:27,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:40:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 336. [2021-07-13 19:40:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.1104477611940298) internal successors, (1042), 335 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1042 transitions. [2021-07-13 19:40:27,629 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1042 transitions. Word has length 20 [2021-07-13 19:40:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:27,629 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1042 transitions. [2021-07-13 19:40:27,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1042 transitions. [2021-07-13 19:40:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:27,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:27,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:27,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1315,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:27,845 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 125 times [2021-07-13 19:40:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:27,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554343365] [2021-07-13 19:40:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:27,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554343365] [2021-07-13 19:40:27,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554343365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429319140] [2021-07-13 19:40:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:28,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:28,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:28,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:28,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:28,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,080 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:40:28,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:28,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:40:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429319140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392172292] [2021-07-13 19:40:28,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:28,135 INFO L87 Difference]: Start difference. First operand 336 states and 1042 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:28,267 INFO L93 Difference]: Finished difference Result 444 states and 1347 transitions. [2021-07-13 19:40:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:28,268 INFO L225 Difference]: With dead ends: 444 [2021-07-13 19:40:28,268 INFO L226 Difference]: Without dead ends: 444 [2021-07-13 19:40:28,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-13 19:40:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 319. [2021-07-13 19:40:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0849056603773586) internal successors, (981), 318 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 981 transitions. [2021-07-13 19:40:28,272 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 981 transitions. Word has length 20 [2021-07-13 19:40:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:28,272 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 981 transitions. [2021-07-13 19:40:28,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 981 transitions. [2021-07-13 19:40:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:28,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:28,273 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:28,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-07-13 19:40:28,477 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 126 times [2021-07-13 19:40:28,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:28,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181348675] [2021-07-13 19:40:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181348675] [2021-07-13 19:40:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181348675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948463914] [2021-07-13 19:40:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:28,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948463914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:28,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:28,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698266196] [2021-07-13 19:40:28,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:28,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:28,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:28,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:28,749 INFO L87 Difference]: Start difference. First operand 319 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:28,904 INFO L93 Difference]: Finished difference Result 397 states and 1189 transitions. [2021-07-13 19:40:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:28,905 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:40:28,905 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:28,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 325. [2021-07-13 19:40:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.111111111111111) internal successors, (1008), 324 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1008 transitions. [2021-07-13 19:40:28,909 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1008 transitions. Word has length 20 [2021-07-13 19:40:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:28,909 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 1008 transitions. [2021-07-13 19:40:28,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1008 transitions. [2021-07-13 19:40:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:28,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:28,910 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-07-13 19:40:29,110 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 127 times [2021-07-13 19:40:29,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277378645] [2021-07-13 19:40:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277378645] [2021-07-13 19:40:29,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277378645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361493350] [2021-07-13 19:40:29,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361493350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:29,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:29,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755038493] [2021-07-13 19:40:29,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:29,305 INFO L87 Difference]: Start difference. First operand 325 states and 1008 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:29,474 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-07-13 19:40:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:29,475 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:40:29,475 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:40:29,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:40:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-07-13 19:40:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.0934579439252334) internal successors, (993), 321 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 993 transitions. [2021-07-13 19:40:29,479 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 993 transitions. Word has length 20 [2021-07-13 19:40:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:29,479 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 993 transitions. [2021-07-13 19:40:29,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 993 transitions. [2021-07-13 19:40:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:29,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:29,479 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-07-13 19:40:29,695 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 128 times [2021-07-13 19:40:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100538261] [2021-07-13 19:40:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:29,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100538261] [2021-07-13 19:40:29,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100538261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051881074] [2021-07-13 19:40:29,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051881074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:29,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:29,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785653263] [2021-07-13 19:40:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:29,894 INFO L87 Difference]: Start difference. First operand 322 states and 993 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:30,041 INFO L93 Difference]: Finished difference Result 361 states and 1097 transitions. [2021-07-13 19:40:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:30,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:30,042 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:40:30,042 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:40:30,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:40:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2021-07-13 19:40:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0825688073394497) internal successors, (1008), 327 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1008 transitions. [2021-07-13 19:40:30,046 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1008 transitions. Word has length 20 [2021-07-13 19:40:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:30,046 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 1008 transitions. [2021-07-13 19:40:30,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1008 transitions. [2021-07-13 19:40:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:30,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:30,047 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:30,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1342,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:30,247 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 129 times [2021-07-13 19:40:30,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:30,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540389975] [2021-07-13 19:40:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540389975] [2021-07-13 19:40:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540389975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196527784] [2021-07-13 19:40:30,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:30,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196527784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:30,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128043956] [2021-07-13 19:40:30,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:30,493 INFO L87 Difference]: Start difference. First operand 328 states and 1008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:30,670 INFO L93 Difference]: Finished difference Result 483 states and 1424 transitions. [2021-07-13 19:40:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:30,672 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:40:30,672 INFO L226 Difference]: Without dead ends: 483 [2021-07-13 19:40:30,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-13 19:40:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 338. [2021-07-13 19:40:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1246290801186944) internal successors, (1053), 337 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-07-13 19:40:30,678 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-07-13 19:40:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:30,678 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-07-13 19:40:30,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-07-13 19:40:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:30,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:30,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:30,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-07-13 19:40:30,879 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:30,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 130 times [2021-07-13 19:40:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:30,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744050891] [2021-07-13 19:40:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744050891] [2021-07-13 19:40:30,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744050891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253118139] [2021-07-13 19:40:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253118139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023672689] [2021-07-13 19:40:31,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:31,118 INFO L87 Difference]: Start difference. First operand 338 states and 1053 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:31,304 INFO L93 Difference]: Finished difference Result 469 states and 1373 transitions. [2021-07-13 19:40:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:31,305 INFO L225 Difference]: With dead ends: 469 [2021-07-13 19:40:31,305 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:40:31,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:40:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-07-13 19:40:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1029411764705883) internal successors, (1055), 340 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-07-13 19:40:31,309 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-07-13 19:40:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:31,309 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-07-13 19:40:31,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-07-13 19:40:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:31,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:31,310 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-07-13 19:40:31,511 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 131 times [2021-07-13 19:40:31,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:31,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581217898] [2021-07-13 19:40:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:31,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581217898] [2021-07-13 19:40:31,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581217898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089414408] [2021-07-13 19:40:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089414408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:31,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008372154] [2021-07-13 19:40:31,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:31,751 INFO L87 Difference]: Start difference. First operand 341 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:31,920 INFO L93 Difference]: Finished difference Result 540 states and 1571 transitions. [2021-07-13 19:40:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:31,921 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:40:31,921 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:40:31,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:40:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-07-13 19:40:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.119533527696793) internal successors, (1070), 343 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-07-13 19:40:31,926 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-07-13 19:40:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:31,926 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-07-13 19:40:31,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-07-13 19:40:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:31,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:31,927 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,127 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 132 times [2021-07-13 19:40:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389716661] [2021-07-13 19:40:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389716661] [2021-07-13 19:40:32,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389716661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636339145] [2021-07-13 19:40:32,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:32,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636339145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:32,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740853435] [2021-07-13 19:40:32,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:32,377 INFO L87 Difference]: Start difference. First operand 344 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:32,555 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2021-07-13 19:40:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:32,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:32,556 INFO L225 Difference]: With dead ends: 509 [2021-07-13 19:40:32,556 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 19:40:32,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 19:40:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-07-13 19:40:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1029411764705883) internal successors, (1055), 340 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-07-13 19:40:32,561 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-07-13 19:40:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:32,561 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-07-13 19:40:32,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-07-13 19:40:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:32,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:32,562 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1369,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,762 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 133 times [2021-07-13 19:40:32,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838702779] [2021-07-13 19:40:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838702779] [2021-07-13 19:40:32,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838702779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322872836] [2021-07-13 19:40:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:33,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322872836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:33,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:33,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:33,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799438364] [2021-07-13 19:40:33,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:33,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:33,032 INFO L87 Difference]: Start difference. First operand 341 states and 1055 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:33,227 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-07-13 19:40:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:33,228 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:40:33,228 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:40:33,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:40:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 345. [2021-07-13 19:40:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.1075581395348837) internal successors, (1069), 344 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1069 transitions. [2021-07-13 19:40:33,234 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1069 transitions. Word has length 20 [2021-07-13 19:40:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:33,234 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1069 transitions. [2021-07-13 19:40:33,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1069 transitions. [2021-07-13 19:40:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:33,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:33,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:33,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-07-13 19:40:33,435 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 134 times [2021-07-13 19:40:33,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:33,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778585839] [2021-07-13 19:40:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:33,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778585839] [2021-07-13 19:40:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778585839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394569128] [2021-07-13 19:40:33,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:33,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:33,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:33,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394569128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:33,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:33,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:33,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518375654] [2021-07-13 19:40:33,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:33,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:33,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:33,702 INFO L87 Difference]: Start difference. First operand 345 states and 1069 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:33,991 INFO L93 Difference]: Finished difference Result 512 states and 1473 transitions. [2021-07-13 19:40:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:33,993 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:40:33,993 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:40:33,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:40:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 342. [2021-07-13 19:40:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1055718475073313) internal successors, (1059), 341 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1059 transitions. [2021-07-13 19:40:33,997 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1059 transitions. Word has length 20 [2021-07-13 19:40:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:33,997 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1059 transitions. [2021-07-13 19:40:33,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1059 transitions. [2021-07-13 19:40:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:33,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:33,998 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:34,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-07-13 19:40:34,198 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 135 times [2021-07-13 19:40:34,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:34,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786328347] [2021-07-13 19:40:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:34,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786328347] [2021-07-13 19:40:34,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786328347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743931397] [2021-07-13 19:40:34,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:34,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743931397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:34,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250492201] [2021-07-13 19:40:34,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:34,442 INFO L87 Difference]: Start difference. First operand 342 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:34,675 INFO L93 Difference]: Finished difference Result 445 states and 1330 transitions. [2021-07-13 19:40:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:34,676 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:40:34,676 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:40:34,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:40:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 343. [2021-07-13 19:40:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1023391812865495) internal successors, (1061), 342 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-07-13 19:40:34,680 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-07-13 19:40:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:34,680 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-07-13 19:40:34,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-07-13 19:40:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:34,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:34,681 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:34,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-07-13 19:40:34,895 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 136 times [2021-07-13 19:40:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:34,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297938202] [2021-07-13 19:40:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:34,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297938202] [2021-07-13 19:40:34,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297938202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296279015] [2021-07-13 19:40:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:35,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:35,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:35,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296279015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:35,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:35,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710493973] [2021-07-13 19:40:35,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:35,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:35,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:35,134 INFO L87 Difference]: Start difference. First operand 343 states and 1061 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:35,325 INFO L93 Difference]: Finished difference Result 439 states and 1312 transitions. [2021-07-13 19:40:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:35,326 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:40:35,326 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:40:35,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:40:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 332. [2021-07-13 19:40:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.093655589123867) internal successors, (1024), 331 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1024 transitions. [2021-07-13 19:40:35,330 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1024 transitions. Word has length 20 [2021-07-13 19:40:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1024 transitions. [2021-07-13 19:40:35,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1024 transitions. [2021-07-13 19:40:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:35,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,330 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:35,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-07-13 19:40:35,531 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 137 times [2021-07-13 19:40:35,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:35,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111997548] [2021-07-13 19:40:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111997548] [2021-07-13 19:40:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111997548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725633578] [2021-07-13 19:40:35,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:35,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725633578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:35,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:35,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064720868] [2021-07-13 19:40:35,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:35,769 INFO L87 Difference]: Start difference. First operand 332 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:35,959 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-07-13 19:40:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:35,959 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:40:35,960 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:40:35,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:40:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2021-07-13 19:40:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0853658536585367) internal successors, (1012), 328 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1012 transitions. [2021-07-13 19:40:35,963 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1012 transitions. Word has length 20 [2021-07-13 19:40:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:35,963 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1012 transitions. [2021-07-13 19:40:35,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1012 transitions. [2021-07-13 19:40:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:35,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,964 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:36,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,164 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 138 times [2021-07-13 19:40:36,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:36,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608922458] [2021-07-13 19:40:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608922458] [2021-07-13 19:40:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608922458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093892439] [2021-07-13 19:40:36,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093892439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:36,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:36,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508335126] [2021-07-13 19:40:36,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:36,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:36,403 INFO L87 Difference]: Start difference. First operand 329 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:36,580 INFO L93 Difference]: Finished difference Result 407 states and 1195 transitions. [2021-07-13 19:40:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:36,581 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:40:36,581 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:40:36,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:40:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2021-07-13 19:40:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.073099415204678) internal successors, (1051), 342 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2021-07-13 19:40:36,585 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2021-07-13 19:40:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:36,585 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2021-07-13 19:40:36,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2021-07-13 19:40:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:36,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:36,586 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:36,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1412,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,786 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 139 times [2021-07-13 19:40:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:36,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111679925] [2021-07-13 19:40:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111679925] [2021-07-13 19:40:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111679925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253131757] [2021-07-13 19:40:36,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253131757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919670619] [2021-07-13 19:40:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:37,025 INFO L87 Difference]: Start difference. First operand 343 states and 1051 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:37,256 INFO L93 Difference]: Finished difference Result 413 states and 1216 transitions. [2021-07-13 19:40:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:37,257 INFO L225 Difference]: With dead ends: 413 [2021-07-13 19:40:37,257 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 19:40:37,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 19:40:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 341. [2021-07-13 19:40:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0764705882352943) internal successors, (1046), 340 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-07-13 19:40:37,261 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-07-13 19:40:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:37,261 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-07-13 19:40:37,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-07-13 19:40:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:37,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:37,262 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:37,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:37,462 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 140 times [2021-07-13 19:40:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:37,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144247795] [2021-07-13 19:40:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144247795] [2021-07-13 19:40:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144247795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134200522] [2021-07-13 19:40:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:37,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134200522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:37,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:37,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278529549] [2021-07-13 19:40:37,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:37,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:37,703 INFO L87 Difference]: Start difference. First operand 341 states and 1046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:37,889 INFO L93 Difference]: Finished difference Result 382 states and 1151 transitions. [2021-07-13 19:40:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:37,890 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:40:37,890 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:40:37,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:40:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2021-07-13 19:40:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.081818181818182) internal successors, (1017), 330 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1017 transitions. [2021-07-13 19:40:37,894 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1017 transitions. Word has length 20 [2021-07-13 19:40:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:37,894 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1017 transitions. [2021-07-13 19:40:37,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1017 transitions. [2021-07-13 19:40:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:37,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:37,895 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-07-13 19:40:38,095 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 141 times [2021-07-13 19:40:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729571007] [2021-07-13 19:40:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729571007] [2021-07-13 19:40:38,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729571007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675979106] [2021-07-13 19:40:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675979106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:38,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:38,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638830705] [2021-07-13 19:40:38,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:38,345 INFO L87 Difference]: Start difference. First operand 331 states and 1017 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,551 INFO L93 Difference]: Finished difference Result 406 states and 1204 transitions. [2021-07-13 19:40:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,552 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:40:38,552 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:40:38,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:40:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 339. [2021-07-13 19:40:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.100591715976331) internal successors, (1048), 338 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1048 transitions. [2021-07-13 19:40:38,556 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1048 transitions. Word has length 20 [2021-07-13 19:40:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,556 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1048 transitions. [2021-07-13 19:40:38,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1048 transitions. [2021-07-13 19:40:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:38,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,556 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-07-13 19:40:38,761 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 142 times [2021-07-13 19:40:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245511076] [2021-07-13 19:40:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245511076] [2021-07-13 19:40:38,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245511076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688720189] [2021-07-13 19:40:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688720189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:39,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864837727] [2021-07-13 19:40:39,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:39,014 INFO L87 Difference]: Start difference. First operand 339 states and 1048 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:39,206 INFO L93 Difference]: Finished difference Result 412 states and 1211 transitions. [2021-07-13 19:40:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:39,207 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:40:39,207 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:40:39,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:40:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 336. [2021-07-13 19:40:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0955223880597016) internal successors, (1037), 335 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-07-13 19:40:39,211 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-07-13 19:40:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:39,211 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-07-13 19:40:39,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-07-13 19:40:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:39,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:39,212 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:39,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-07-13 19:40:39,412 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 143 times [2021-07-13 19:40:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:39,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458089716] [2021-07-13 19:40:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:39,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458089716] [2021-07-13 19:40:39,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458089716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941081307] [2021-07-13 19:40:39,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:39,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:39,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941081307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:39,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:39,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431716205] [2021-07-13 19:40:39,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:39,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:39,660 INFO L87 Difference]: Start difference. First operand 336 states and 1037 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:39,890 INFO L93 Difference]: Finished difference Result 376 states and 1129 transitions. [2021-07-13 19:40:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:39,891 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:40:39,891 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:40:39,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:40:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 333. [2021-07-13 19:40:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0903614457831323) internal successors, (1026), 332 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-07-13 19:40:39,894 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-07-13 19:40:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:39,895 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-07-13 19:40:39,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-07-13 19:40:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:39,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:39,895 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:40,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-07-13 19:40:40,096 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 144 times [2021-07-13 19:40:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:40,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201783213] [2021-07-13 19:40:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:40,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201783213] [2021-07-13 19:40:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201783213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438098311] [2021-07-13 19:40:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:40,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438098311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:40,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112264387] [2021-07-13 19:40:40,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:40,347 INFO L87 Difference]: Start difference. First operand 333 states and 1026 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:40,584 INFO L93 Difference]: Finished difference Result 493 states and 1422 transitions. [2021-07-13 19:40:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:40,585 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:40:40,585 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:40:40,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:40:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 341. [2021-07-13 19:40:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.123529411764706) internal successors, (1062), 340 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1062 transitions. [2021-07-13 19:40:40,590 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1062 transitions. Word has length 20 [2021-07-13 19:40:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:40,590 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1062 transitions. [2021-07-13 19:40:40,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1062 transitions. [2021-07-13 19:40:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:40,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:40,590 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:40,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-07-13 19:40:40,791 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 145 times [2021-07-13 19:40:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:40,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269625628] [2021-07-13 19:40:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:40,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269625628] [2021-07-13 19:40:40,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269625628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778643245] [2021-07-13 19:40:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778643245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:41,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:41,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006178672] [2021-07-13 19:40:41,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:41,061 INFO L87 Difference]: Start difference. First operand 341 states and 1062 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:41,305 INFO L93 Difference]: Finished difference Result 499 states and 1423 transitions. [2021-07-13 19:40:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:41,306 INFO L225 Difference]: With dead ends: 499 [2021-07-13 19:40:41,306 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:40:41,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:40:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 344. [2021-07-13 19:40:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1020408163265305) internal successors, (1064), 343 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1064 transitions. [2021-07-13 19:40:41,310 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1064 transitions. Word has length 20 [2021-07-13 19:40:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:41,310 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1064 transitions. [2021-07-13 19:40:41,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1064 transitions. [2021-07-13 19:40:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:41,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:41,311 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:41,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-07-13 19:40:41,511 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:41,511 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 146 times [2021-07-13 19:40:41,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:41,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025803350] [2021-07-13 19:40:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025803350] [2021-07-13 19:40:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025803350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805527204] [2021-07-13 19:40:41,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:41,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805527204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:41,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:41,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311196914] [2021-07-13 19:40:41,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:41,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:41,816 INFO L87 Difference]: Start difference. First operand 344 states and 1064 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:41,972 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-07-13 19:40:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:41,973 INFO L225 Difference]: With dead ends: 461 [2021-07-13 19:40:41,973 INFO L226 Difference]: Without dead ends: 461 [2021-07-13 19:40:41,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-13 19:40:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2021-07-13 19:40:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.113095238095238) internal successors, (1046), 336 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1046 transitions. [2021-07-13 19:40:41,978 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1046 transitions. Word has length 20 [2021-07-13 19:40:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:41,978 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1046 transitions. [2021-07-13 19:40:41,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1046 transitions. [2021-07-13 19:40:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:41,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:41,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-07-13 19:40:42,179 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 147 times [2021-07-13 19:40:42,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775099316] [2021-07-13 19:40:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775099316] [2021-07-13 19:40:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775099316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100096694] [2021-07-13 19:40:42,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100096694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:42,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:42,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409407922] [2021-07-13 19:40:42,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:42,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:42,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:42,466 INFO L87 Difference]: Start difference. First operand 337 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:42,593 INFO L93 Difference]: Finished difference Result 424 states and 1261 transitions. [2021-07-13 19:40:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:42,594 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:40:42,594 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:40:42,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:40:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 334. [2021-07-13 19:40:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.096096096096096) internal successors, (1031), 333 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1031 transitions. [2021-07-13 19:40:42,598 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1031 transitions. Word has length 20 [2021-07-13 19:40:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1031 transitions. [2021-07-13 19:40:42,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1031 transitions. [2021-07-13 19:40:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:42,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:42,599 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-07-13 19:40:42,799 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 148 times [2021-07-13 19:40:42,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343642858] [2021-07-13 19:40:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343642858] [2021-07-13 19:40:42,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343642858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903552867] [2021-07-13 19:40:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903552867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491553513] [2021-07-13 19:40:43,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:43,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:43,081 INFO L87 Difference]: Start difference. First operand 334 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:43,321 INFO L93 Difference]: Finished difference Result 461 states and 1335 transitions. [2021-07-13 19:40:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:43,322 INFO L225 Difference]: With dead ends: 461 [2021-07-13 19:40:43,323 INFO L226 Difference]: Without dead ends: 455 [2021-07-13 19:40:43,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-13 19:40:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 344. [2021-07-13 19:40:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0845481049562684) internal successors, (1058), 343 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1058 transitions. [2021-07-13 19:40:43,327 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1058 transitions. Word has length 20 [2021-07-13 19:40:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:43,327 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1058 transitions. [2021-07-13 19:40:43,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1058 transitions. [2021-07-13 19:40:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:43,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:43,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:43,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-07-13 19:40:43,528 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:43,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 149 times [2021-07-13 19:40:43,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:43,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966142257] [2021-07-13 19:40:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:43,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966142257] [2021-07-13 19:40:43,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966142257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900572818] [2021-07-13 19:40:43,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:43,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900572818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:43,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836231577] [2021-07-13 19:40:43,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:43,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:43,760 INFO L87 Difference]: Start difference. First operand 344 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:44,019 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2021-07-13 19:40:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:44,020 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:40:44,020 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:40:44,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:40:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 333. [2021-07-13 19:40:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0903614457831323) internal successors, (1026), 332 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-07-13 19:40:44,024 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-07-13 19:40:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:44,024 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-07-13 19:40:44,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-07-13 19:40:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:44,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:44,025 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:44,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-07-13 19:40:44,227 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 150 times [2021-07-13 19:40:44,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:44,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280103807] [2021-07-13 19:40:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280103807] [2021-07-13 19:40:44,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280103807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646400238] [2021-07-13 19:40:44,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646400238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:44,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474349379] [2021-07-13 19:40:44,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:44,499 INFO L87 Difference]: Start difference. First operand 333 states and 1026 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:44,702 INFO L93 Difference]: Finished difference Result 378 states and 1133 transitions. [2021-07-13 19:40:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:44,703 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:40:44,703 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:40:44,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:40:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2021-07-13 19:40:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-07-13 19:40:44,707 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-07-13 19:40:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:44,707 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-07-13 19:40:44,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-07-13 19:40:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:44,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:44,708 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:44,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,908 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 151 times [2021-07-13 19:40:44,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:44,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321976464] [2021-07-13 19:40:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321976464] [2021-07-13 19:40:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321976464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006864500] [2021-07-13 19:40:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006864500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384756653] [2021-07-13 19:40:45,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:45,151 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:45,377 INFO L93 Difference]: Finished difference Result 403 states and 1185 transitions. [2021-07-13 19:40:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:45,378 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:40:45,378 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:45,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 345. [2021-07-13 19:40:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0755813953488373) internal successors, (1058), 344 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1058 transitions. [2021-07-13 19:40:45,382 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1058 transitions. Word has length 20 [2021-07-13 19:40:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:45,382 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1058 transitions. [2021-07-13 19:40:45,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1058 transitions. [2021-07-13 19:40:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:45,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:45,382 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:45,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,583 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 152 times [2021-07-13 19:40:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367619215] [2021-07-13 19:40:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:45,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367619215] [2021-07-13 19:40:45,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367619215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63654666] [2021-07-13 19:40:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:45,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63654666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:45,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754494236] [2021-07-13 19:40:45,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:45,836 INFO L87 Difference]: Start difference. First operand 345 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,017 INFO L93 Difference]: Finished difference Result 374 states and 1131 transitions. [2021-07-13 19:40:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,018 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:40:46,018 INFO L226 Difference]: Without dead ends: 374 [2021-07-13 19:40:46,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-13 19:40:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-07-13 19:40:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.084592145015106) internal successors, (1021), 331 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-07-13 19:40:46,022 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-07-13 19:40:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,022 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-07-13 19:40:46,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-07-13 19:40:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:46,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,022 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-07-13 19:40:46,223 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 153 times [2021-07-13 19:40:46,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072480889] [2021-07-13 19:40:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072480889] [2021-07-13 19:40:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072480889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55883971] [2021-07-13 19:40:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55883971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:46,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:46,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455450464] [2021-07-13 19:40:46,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:46,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:46,441 INFO L87 Difference]: Start difference. First operand 332 states and 1021 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,620 INFO L93 Difference]: Finished difference Result 451 states and 1333 transitions. [2021-07-13 19:40:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,621 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:40:46,621 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:40:46,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:40:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 342. [2021-07-13 19:40:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.126099706744868) internal successors, (1066), 341 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1066 transitions. [2021-07-13 19:40:46,626 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1066 transitions. Word has length 20 [2021-07-13 19:40:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,626 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1066 transitions. [2021-07-13 19:40:46,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1066 transitions. [2021-07-13 19:40:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:46,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,626 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1563,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,827 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 154 times [2021-07-13 19:40:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242543435] [2021-07-13 19:40:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242543435] [2021-07-13 19:40:46,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242543435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082502236] [2021-07-13 19:40:46,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082502236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:47,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495696739] [2021-07-13 19:40:47,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:47,054 INFO L87 Difference]: Start difference. First operand 342 states and 1066 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:47,262 INFO L93 Difference]: Finished difference Result 457 states and 1334 transitions. [2021-07-13 19:40:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:47,263 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:40:47,263 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:40:47,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:40:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 345. [2021-07-13 19:40:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-13 19:40:47,268 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-13 19:40:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:47,268 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-13 19:40:47,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-13 19:40:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:47,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:47,269 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:47,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-07-13 19:40:47,485 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 155 times [2021-07-13 19:40:47,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:47,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608826841] [2021-07-13 19:40:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:47,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608826841] [2021-07-13 19:40:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608826841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989331462] [2021-07-13 19:40:47,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:47,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989331462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:47,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:47,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216873781] [2021-07-13 19:40:47,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:47,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:47,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:47,722 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:47,882 INFO L93 Difference]: Finished difference Result 509 states and 1476 transitions. [2021-07-13 19:40:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:47,883 INFO L225 Difference]: With dead ends: 509 [2021-07-13 19:40:47,883 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 19:40:47,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 19:40:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-07-13 19:40:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.121037463976945) internal successors, (1083), 347 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1083 transitions. [2021-07-13 19:40:47,889 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1083 transitions. Word has length 20 [2021-07-13 19:40:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:47,889 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1083 transitions. [2021-07-13 19:40:47,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1083 transitions. [2021-07-13 19:40:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:47,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:47,889 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:48,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-13 19:40:48,105 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 156 times [2021-07-13 19:40:48,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:48,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481336562] [2021-07-13 19:40:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:48,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481336562] [2021-07-13 19:40:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481336562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152490406] [2021-07-13 19:40:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152490406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:48,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46821737] [2021-07-13 19:40:48,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:48,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:48,338 INFO L87 Difference]: Start difference. First operand 348 states and 1083 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:48,563 INFO L93 Difference]: Finished difference Result 472 states and 1394 transitions. [2021-07-13 19:40:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:48,564 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:40:48,564 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:40:48,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:40:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 345. [2021-07-13 19:40:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-13 19:40:48,569 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-13 19:40:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:48,569 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-13 19:40:48,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-13 19:40:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:48,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:48,570 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:48,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-07-13 19:40:48,771 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 157 times [2021-07-13 19:40:48,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:48,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487578838] [2021-07-13 19:40:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487578838] [2021-07-13 19:40:48,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487578838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826349705] [2021-07-13 19:40:48,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826349705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:49,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:49,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147245144] [2021-07-13 19:40:49,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:49,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:49,021 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:49,251 INFO L93 Difference]: Finished difference Result 497 states and 1428 transitions. [2021-07-13 19:40:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:49,252 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:40:49,252 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:40:49,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:40:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 349. [2021-07-13 19:40:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1091954022988504) internal successors, (1082), 348 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1082 transitions. [2021-07-13 19:40:49,257 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1082 transitions. Word has length 20 [2021-07-13 19:40:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:49,257 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1082 transitions. [2021-07-13 19:40:49,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1082 transitions. [2021-07-13 19:40:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:49,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:49,257 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:49,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:49,458 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 158 times [2021-07-13 19:40:49,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:49,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243495433] [2021-07-13 19:40:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:49,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243495433] [2021-07-13 19:40:49,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243495433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177029489] [2021-07-13 19:40:49,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:49,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:49,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:49,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177029489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:49,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:49,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244713718] [2021-07-13 19:40:49,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:49,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:49,706 INFO L87 Difference]: Start difference. First operand 349 states and 1082 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:49,940 INFO L93 Difference]: Finished difference Result 503 states and 1449 transitions. [2021-07-13 19:40:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:49,941 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:40:49,941 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:40:49,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:40:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 346. [2021-07-13 19:40:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1072463768115943) internal successors, (1072), 345 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1072 transitions. [2021-07-13 19:40:49,946 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1072 transitions. Word has length 20 [2021-07-13 19:40:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:49,946 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1072 transitions. [2021-07-13 19:40:49,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1072 transitions. [2021-07-13 19:40:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:49,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:49,946 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:50,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:50,148 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 159 times [2021-07-13 19:40:50,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:50,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445608270] [2021-07-13 19:40:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445608270] [2021-07-13 19:40:50,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445608270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100809269] [2021-07-13 19:40:50,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:50,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:50,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100809269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:50,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967861674] [2021-07-13 19:40:50,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:50,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:50,415 INFO L87 Difference]: Start difference. First operand 346 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:50,674 INFO L93 Difference]: Finished difference Result 433 states and 1294 transitions. [2021-07-13 19:40:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:50,675 INFO L225 Difference]: With dead ends: 433 [2021-07-13 19:40:50,675 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:40:50,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:40:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2021-07-13 19:40:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1040462427745665) internal successors, (1074), 346 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1074 transitions. [2021-07-13 19:40:50,679 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1074 transitions. Word has length 20 [2021-07-13 19:40:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:50,680 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1074 transitions. [2021-07-13 19:40:50,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1074 transitions. [2021-07-13 19:40:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:50,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:50,680 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:50,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:50,881 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 160 times [2021-07-13 19:40:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:50,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077563632] [2021-07-13 19:40:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077563632] [2021-07-13 19:40:50,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077563632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260114466] [2021-07-13 19:40:50,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:51,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260114466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:51,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562846942] [2021-07-13 19:40:51,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:51,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:51,126 INFO L87 Difference]: Start difference. First operand 347 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:51,321 INFO L93 Difference]: Finished difference Result 421 states and 1261 transitions. [2021-07-13 19:40:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:51,322 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:40:51,322 INFO L226 Difference]: Without dead ends: 421 [2021-07-13 19:40:51,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-13 19:40:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2021-07-13 19:40:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0955223880597016) internal successors, (1037), 335 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-07-13 19:40:51,326 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-07-13 19:40:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:51,327 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-07-13 19:40:51,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-07-13 19:40:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:51,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:51,327 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:51,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,528 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 161 times [2021-07-13 19:40:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:51,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638393114] [2021-07-13 19:40:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638393114] [2021-07-13 19:40:51,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638393114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829951924] [2021-07-13 19:40:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829951924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91494069] [2021-07-13 19:40:51,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:51,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:51,761 INFO L87 Difference]: Start difference. First operand 336 states and 1037 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:51,959 INFO L93 Difference]: Finished difference Result 376 states and 1139 transitions. [2021-07-13 19:40:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:51,960 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:40:51,960 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:40:51,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:40:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2021-07-13 19:40:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0873493975903616) internal successors, (1025), 332 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1025 transitions. [2021-07-13 19:40:51,964 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1025 transitions. Word has length 20 [2021-07-13 19:40:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:51,964 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1025 transitions. [2021-07-13 19:40:51,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1025 transitions. [2021-07-13 19:40:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:51,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:51,964 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-07-13 19:40:52,165 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 162 times [2021-07-13 19:40:52,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894858453] [2021-07-13 19:40:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894858453] [2021-07-13 19:40:52,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894858453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286548603] [2021-07-13 19:40:52,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:52,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286548603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:52,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:52,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967247212] [2021-07-13 19:40:52,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:52,405 INFO L87 Difference]: Start difference. First operand 333 states and 1025 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:52,615 INFO L93 Difference]: Finished difference Result 421 states and 1233 transitions. [2021-07-13 19:40:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:52,616 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:40:52,616 INFO L226 Difference]: Without dead ends: 415 [2021-07-13 19:40:52,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-13 19:40:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 347. [2021-07-13 19:40:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0751445086705202) internal successors, (1064), 346 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2021-07-13 19:40:52,620 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2021-07-13 19:40:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:52,620 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2021-07-13 19:40:52,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2021-07-13 19:40:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:52,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:52,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-07-13 19:40:52,822 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 163 times [2021-07-13 19:40:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660808905] [2021-07-13 19:40:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660808905] [2021-07-13 19:40:52,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660808905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068003738] [2021-07-13 19:40:52,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068003738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:53,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723186605] [2021-07-13 19:40:53,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:53,103 INFO L87 Difference]: Start difference. First operand 347 states and 1064 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:53,320 INFO L93 Difference]: Finished difference Result 427 states and 1254 transitions. [2021-07-13 19:40:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:53,321 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:40:53,321 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:40:53,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:40:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 345. [2021-07-13 19:40:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.078488372093023) internal successors, (1059), 344 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2021-07-13 19:40:53,325 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2021-07-13 19:40:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:53,325 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2021-07-13 19:40:53,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2021-07-13 19:40:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:53,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:53,326 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:53,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-13 19:40:53,533 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 164 times [2021-07-13 19:40:53,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:53,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438445164] [2021-07-13 19:40:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438445164] [2021-07-13 19:40:53,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438445164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695980568] [2021-07-13 19:40:53,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:53,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:53,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695980568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:53,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:53,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491649743] [2021-07-13 19:40:53,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:53,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:53,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:53,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:53,734 INFO L87 Difference]: Start difference. First operand 345 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:53,914 INFO L93 Difference]: Finished difference Result 396 states and 1189 transitions. [2021-07-13 19:40:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:53,915 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:40:53,915 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:40:53,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:40:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 332. [2021-07-13 19:40:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.084592145015106) internal successors, (1021), 331 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-07-13 19:40:53,919 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-07-13 19:40:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:53,919 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-07-13 19:40:53,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-07-13 19:40:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:53,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:53,919 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:54,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-13 19:40:54,120 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 165 times [2021-07-13 19:40:54,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:54,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125354666] [2021-07-13 19:40:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:54,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125354666] [2021-07-13 19:40:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125354666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114687651] [2021-07-13 19:40:54,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:54,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:54,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114687651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:54,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:54,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396721684] [2021-07-13 19:40:54,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:54,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:54,311 INFO L87 Difference]: Start difference. First operand 332 states and 1021 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:54,460 INFO L93 Difference]: Finished difference Result 366 states and 1100 transitions. [2021-07-13 19:40:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:54,461 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:40:54,461 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:40:54,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:40:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2021-07-13 19:40:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0776119402985076) internal successors, (1031), 335 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1031 transitions. [2021-07-13 19:40:54,465 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1031 transitions. Word has length 20 [2021-07-13 19:40:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:54,465 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1031 transitions. [2021-07-13 19:40:54,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1031 transitions. [2021-07-13 19:40:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:54,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:54,465 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:54,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:54,681 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 166 times [2021-07-13 19:40:54,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:54,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244951877] [2021-07-13 19:40:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:54,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244951877] [2021-07-13 19:40:54,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244951877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733369821] [2021-07-13 19:40:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:54,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:54,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733369821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756539472] [2021-07-13 19:40:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:54,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:54,887 INFO L87 Difference]: Start difference. First operand 336 states and 1031 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:55,063 INFO L93 Difference]: Finished difference Result 391 states and 1152 transitions. [2021-07-13 19:40:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:55,064 INFO L225 Difference]: With dead ends: 391 [2021-07-13 19:40:55,064 INFO L226 Difference]: Without dead ends: 385 [2021-07-13 19:40:55,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-13 19:40:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 346. [2021-07-13 19:40:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.066666666666667) internal successors, (1058), 345 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1058 transitions. [2021-07-13 19:40:55,068 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1058 transitions. Word has length 20 [2021-07-13 19:40:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:55,068 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1058 transitions. [2021-07-13 19:40:55,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1058 transitions. [2021-07-13 19:40:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:55,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:55,069 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:55,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-07-13 19:40:55,269 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 167 times [2021-07-13 19:40:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836698311] [2021-07-13 19:40:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836698311] [2021-07-13 19:40:55,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836698311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180931766] [2021-07-13 19:40:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:55,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:55,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180931766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:55,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:55,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123816893] [2021-07-13 19:40:55,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:55,461 INFO L87 Difference]: Start difference. First operand 346 states and 1058 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:55,582 INFO L93 Difference]: Finished difference Result 362 states and 1098 transitions. [2021-07-13 19:40:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:55,583 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:40:55,583 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 19:40:55,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 19:40:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 334. [2021-07-13 19:40:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.081081081081081) internal successors, (1026), 333 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-07-13 19:40:55,587 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-07-13 19:40:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:55,587 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-07-13 19:40:55,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-07-13 19:40:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:55,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:55,587 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:55,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:55,788 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 168 times [2021-07-13 19:40:55,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:55,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878114760] [2021-07-13 19:40:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878114760] [2021-07-13 19:40:55,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878114760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98222021] [2021-07-13 19:40:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:55,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:55,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98222021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:55,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630199478] [2021-07-13 19:40:55,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:55,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:55,974 INFO L87 Difference]: Start difference. First operand 334 states and 1026 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:56,098 INFO L93 Difference]: Finished difference Result 397 states and 1167 transitions. [2021-07-13 19:40:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:56,099 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:40:56,099 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:40:56,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:40:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-07-13 19:40:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.069164265129683) internal successors, (1065), 347 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1065 transitions. [2021-07-13 19:40:56,103 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1065 transitions. Word has length 20 [2021-07-13 19:40:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,103 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1065 transitions. [2021-07-13 19:40:56,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1065 transitions. [2021-07-13 19:40:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:56,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,104 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-07-13 19:40:56,304 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 169 times [2021-07-13 19:40:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887480057] [2021-07-13 19:40:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887480057] [2021-07-13 19:40:56,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887480057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979340218] [2021-07-13 19:40:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979340218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:56,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:56,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997352751] [2021-07-13 19:40:56,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:56,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:56,511 INFO L87 Difference]: Start difference. First operand 348 states and 1065 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:56,642 INFO L93 Difference]: Finished difference Result 397 states and 1173 transitions. [2021-07-13 19:40:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:56,643 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:40:56,643 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:56,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:56,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 346. [2021-07-13 19:40:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.072463768115942) internal successors, (1060), 345 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2021-07-13 19:40:56,647 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2021-07-13 19:40:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,647 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2021-07-13 19:40:56,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2021-07-13 19:40:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:56,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,647 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,850 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 170 times [2021-07-13 19:40:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116550098] [2021-07-13 19:40:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116550098] [2021-07-13 19:40:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116550098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9259513] [2021-07-13 19:40:56,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9259513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:57,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:57,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913429514] [2021-07-13 19:40:57,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:57,018 INFO L87 Difference]: Start difference. First operand 346 states and 1060 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:57,132 INFO L93 Difference]: Finished difference Result 372 states and 1123 transitions. [2021-07-13 19:40:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:57,133 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:40:57,133 INFO L226 Difference]: Without dead ends: 372 [2021-07-13 19:40:57,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-13 19:40:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 334. [2021-07-13 19:40:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.081081081081081) internal successors, (1026), 333 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-07-13 19:40:57,137 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-07-13 19:40:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:57,137 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-07-13 19:40:57,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-07-13 19:40:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:57,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:57,137 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:57,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-07-13 19:40:57,338 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 171 times [2021-07-13 19:40:57,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:57,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641499833] [2021-07-13 19:40:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641499833] [2021-07-13 19:40:57,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641499833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094690539] [2021-07-13 19:40:57,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:57,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094690539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:57,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:40:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982649341] [2021-07-13 19:40:57,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:40:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:40:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:57,656 INFO L87 Difference]: Start difference. First operand 334 states and 1026 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:58,055 INFO L93 Difference]: Finished difference Result 550 states and 1636 transitions. [2021-07-13 19:40:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:58,056 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:40:58,056 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 19:40:58,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 19:40:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-07-13 19:40:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-13 19:40:58,061 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-13 19:40:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:58,061 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-13 19:40:58,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-13 19:40:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:58,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:58,061 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:58,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:58,262 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 172 times [2021-07-13 19:40:58,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:58,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799736179] [2021-07-13 19:40:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799736179] [2021-07-13 19:40:58,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799736179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680441491] [2021-07-13 19:40:58,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:58,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:58,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680441491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:58,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:40:58,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841805394] [2021-07-13 19:40:58,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:40:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:40:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:58,521 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:58,896 INFO L93 Difference]: Finished difference Result 556 states and 1643 transitions. [2021-07-13 19:40:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:58,897 INFO L225 Difference]: With dead ends: 556 [2021-07-13 19:40:58,897 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 19:40:58,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 19:40:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-07-13 19:40:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.099706744868035) internal successors, (1057), 341 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1057 transitions. [2021-07-13 19:40:58,902 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1057 transitions. Word has length 20 [2021-07-13 19:40:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:58,902 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1057 transitions. [2021-07-13 19:40:58,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1057 transitions. [2021-07-13 19:40:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:58,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:58,903 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:59,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1723 [2021-07-13 19:40:59,103 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 173 times [2021-07-13 19:40:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:59,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612505606] [2021-07-13 19:40:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612505606] [2021-07-13 19:40:59,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612505606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192713880] [2021-07-13 19:40:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:59,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192713880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:59,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:40:59,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145972244] [2021-07-13 19:40:59,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:40:59,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:40:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:59,360 INFO L87 Difference]: Start difference. First operand 342 states and 1057 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:59,662 INFO L93 Difference]: Finished difference Result 520 states and 1561 transitions. [2021-07-13 19:40:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:40:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:59,663 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:40:59,663 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:40:59,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:40:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 339. [2021-07-13 19:40:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.094674556213018) internal successors, (1046), 338 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1046 transitions. [2021-07-13 19:40:59,667 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1046 transitions. Word has length 20 [2021-07-13 19:40:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:59,667 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1046 transitions. [2021-07-13 19:40:59,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1046 transitions. [2021-07-13 19:40:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:59,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:59,668 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:59,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-07-13 19:40:59,868 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 174 times [2021-07-13 19:40:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335572228] [2021-07-13 19:40:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:59,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335572228] [2021-07-13 19:40:59,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335572228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653827597] [2021-07-13 19:40:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653827597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:00,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410536785] [2021-07-13 19:41:00,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:00,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:00,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:00,129 INFO L87 Difference]: Start difference. First operand 339 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:00,499 INFO L93 Difference]: Finished difference Result 552 states and 1621 transitions. [2021-07-13 19:41:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:00,500 INFO L225 Difference]: With dead ends: 552 [2021-07-13 19:41:00,500 INFO L226 Difference]: Without dead ends: 534 [2021-07-13 19:41:00,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-13 19:41:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-07-13 19:41:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.08955223880597) internal successors, (1035), 335 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-07-13 19:41:00,504 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-07-13 19:41:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:00,504 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-07-13 19:41:00,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-07-13 19:41:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:00,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:00,505 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:00,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:00,705 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:00,706 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 175 times [2021-07-13 19:41:00,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:00,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655728824] [2021-07-13 19:41:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:00,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655728824] [2021-07-13 19:41:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655728824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441772247] [2021-07-13 19:41:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441772247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:00,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:00,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723179489] [2021-07-13 19:41:00,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:00,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:00,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:00,982 INFO L87 Difference]: Start difference. First operand 336 states and 1035 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:01,233 INFO L93 Difference]: Finished difference Result 562 states and 1666 transitions. [2021-07-13 19:41:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:01,235 INFO L225 Difference]: With dead ends: 562 [2021-07-13 19:41:01,235 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:41:01,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:41:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 343. [2021-07-13 19:41:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1052631578947367) internal successors, (1062), 342 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1062 transitions. [2021-07-13 19:41:01,239 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1062 transitions. Word has length 20 [2021-07-13 19:41:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:01,239 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1062 transitions. [2021-07-13 19:41:01,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1062 transitions. [2021-07-13 19:41:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:01,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:01,240 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:01,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-07-13 19:41:01,440 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 176 times [2021-07-13 19:41:01,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:01,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468552906] [2021-07-13 19:41:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:01,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468552906] [2021-07-13 19:41:01,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468552906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481545197] [2021-07-13 19:41:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:01,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481545197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:01,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:01,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205585077] [2021-07-13 19:41:01,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:01,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:01,707 INFO L87 Difference]: Start difference. First operand 343 states and 1062 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:02,008 INFO L93 Difference]: Finished difference Result 568 states and 1673 transitions. [2021-07-13 19:41:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:02,010 INFO L225 Difference]: With dead ends: 568 [2021-07-13 19:41:02,010 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:41:02,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:41:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 340. [2021-07-13 19:41:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1002949852507373) internal successors, (1051), 339 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1051 transitions. [2021-07-13 19:41:02,014 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1051 transitions. Word has length 20 [2021-07-13 19:41:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:02,014 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1051 transitions. [2021-07-13 19:41:02,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1051 transitions. [2021-07-13 19:41:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:02,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:02,015 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:02,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:02,215 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 177 times [2021-07-13 19:41:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:02,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250619057] [2021-07-13 19:41:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:02,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250619057] [2021-07-13 19:41:02,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250619057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108684153] [2021-07-13 19:41:02,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:02,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108684153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:02,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297229813] [2021-07-13 19:41:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:02,493 INFO L87 Difference]: Start difference. First operand 340 states and 1051 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:02,732 INFO L93 Difference]: Finished difference Result 532 states and 1591 transitions. [2021-07-13 19:41:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:02,733 INFO L225 Difference]: With dead ends: 532 [2021-07-13 19:41:02,733 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:41:02,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:41:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 337. [2021-07-13 19:41:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-13 19:41:02,737 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-13 19:41:02,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-13 19:41:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:02,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:02,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:02,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-07-13 19:41:02,938 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 178 times [2021-07-13 19:41:02,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:02,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603838970] [2021-07-13 19:41:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603838970] [2021-07-13 19:41:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603838970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206609086] [2021-07-13 19:41:03,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:03,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206609086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:03,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060432728] [2021-07-13 19:41:03,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:03,228 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:03,691 INFO L93 Difference]: Finished difference Result 640 states and 1863 transitions. [2021-07-13 19:41:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:03,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:03,693 INFO L225 Difference]: With dead ends: 640 [2021-07-13 19:41:03,693 INFO L226 Difference]: Without dead ends: 640 [2021-07-13 19:41:03,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-13 19:41:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2021-07-13 19:41:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.127906976744186) internal successors, (1076), 344 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1076 transitions. [2021-07-13 19:41:03,698 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1076 transitions. Word has length 20 [2021-07-13 19:41:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:03,698 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1076 transitions. [2021-07-13 19:41:03,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1076 transitions. [2021-07-13 19:41:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:03,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:03,699 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:03,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-13 19:41:03,899 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 179 times [2021-07-13 19:41:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:03,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244295807] [2021-07-13 19:41:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244295807] [2021-07-13 19:41:03,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244295807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135624962] [2021-07-13 19:41:03,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:04,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:04,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:04,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135624962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:04,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:04,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151638321] [2021-07-13 19:41:04,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:04,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:04,209 INFO L87 Difference]: Start difference. First operand 345 states and 1076 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:04,768 INFO L93 Difference]: Finished difference Result 646 states and 1864 transitions. [2021-07-13 19:41:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:04,769 INFO L225 Difference]: With dead ends: 646 [2021-07-13 19:41:04,769 INFO L226 Difference]: Without dead ends: 640 [2021-07-13 19:41:04,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-13 19:41:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-07-13 19:41:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.106628242074928) internal successors, (1078), 347 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1078 transitions. [2021-07-13 19:41:04,774 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1078 transitions. Word has length 20 [2021-07-13 19:41:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:04,774 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1078 transitions. [2021-07-13 19:41:04,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1078 transitions. [2021-07-13 19:41:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:04,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:04,775 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:04,989 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 180 times [2021-07-13 19:41:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:04,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56890428] [2021-07-13 19:41:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56890428] [2021-07-13 19:41:05,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56890428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728362202] [2021-07-13 19:41:05,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:05,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728362202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:05,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:05,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476791780] [2021-07-13 19:41:05,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:05,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:05,262 INFO L87 Difference]: Start difference. First operand 348 states and 1078 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:05,525 INFO L93 Difference]: Finished difference Result 608 states and 1784 transitions. [2021-07-13 19:41:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:05,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:05,526 INFO L225 Difference]: With dead ends: 608 [2021-07-13 19:41:05,526 INFO L226 Difference]: Without dead ends: 608 [2021-07-13 19:41:05,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-13 19:41:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 341. [2021-07-13 19:41:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1176470588235294) internal successors, (1060), 340 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1060 transitions. [2021-07-13 19:41:05,531 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1060 transitions. Word has length 20 [2021-07-13 19:41:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:05,531 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1060 transitions. [2021-07-13 19:41:05,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1060 transitions. [2021-07-13 19:41:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:05,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:05,532 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:05,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-07-13 19:41:05,733 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 181 times [2021-07-13 19:41:05,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:05,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968743105] [2021-07-13 19:41:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968743105] [2021-07-13 19:41:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968743105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671864390] [2021-07-13 19:41:05,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671864390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:06,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:06,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899662408] [2021-07-13 19:41:06,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:06,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:06,056 INFO L87 Difference]: Start difference. First operand 341 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:06,332 INFO L93 Difference]: Finished difference Result 571 states and 1702 transitions. [2021-07-13 19:41:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:06,333 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:41:06,333 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:41:06,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:41:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 338. [2021-07-13 19:41:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1008902077151337) internal successors, (1045), 337 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1045 transitions. [2021-07-13 19:41:06,338 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1045 transitions. Word has length 20 [2021-07-13 19:41:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:06,338 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1045 transitions. [2021-07-13 19:41:06,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1045 transitions. [2021-07-13 19:41:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:06,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:06,338 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:06,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:06,539 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 182 times [2021-07-13 19:41:06,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:06,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24264734] [2021-07-13 19:41:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:06,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:06,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24264734] [2021-07-13 19:41:06,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24264734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900497394] [2021-07-13 19:41:06,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:06,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900497394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:06,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:06,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992670017] [2021-07-13 19:41:06,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:06,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:06,815 INFO L87 Difference]: Start difference. First operand 338 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:07,337 INFO L93 Difference]: Finished difference Result 608 states and 1776 transitions. [2021-07-13 19:41:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:07,338 INFO L225 Difference]: With dead ends: 608 [2021-07-13 19:41:07,338 INFO L226 Difference]: Without dead ends: 602 [2021-07-13 19:41:07,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-13 19:41:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 348. [2021-07-13 19:41:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.089337175792507) internal successors, (1072), 347 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1072 transitions. [2021-07-13 19:41:07,344 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:07,344 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1072 transitions. [2021-07-13 19:41:07,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1072 transitions. [2021-07-13 19:41:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:07,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:07,344 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:07,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1817,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:07,545 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 183 times [2021-07-13 19:41:07,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:07,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428404297] [2021-07-13 19:41:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428404297] [2021-07-13 19:41:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428404297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019897353] [2021-07-13 19:41:07,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:07,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019897353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:07,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:07,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325949063] [2021-07-13 19:41:07,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:07,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:07,864 INFO L87 Difference]: Start difference. First operand 348 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:08,335 INFO L93 Difference]: Finished difference Result 585 states and 1737 transitions. [2021-07-13 19:41:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:08,336 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:41:08,336 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 19:41:08,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 19:41:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 337. [2021-07-13 19:41:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-13 19:41:08,341 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:08,341 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-13 19:41:08,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-13 19:41:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:08,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:08,342 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:08,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,542 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 184 times [2021-07-13 19:41:08,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:08,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612895577] [2021-07-13 19:41:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:08,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612895577] [2021-07-13 19:41:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612895577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356531607] [2021-07-13 19:41:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356531607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:08,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864139841] [2021-07-13 19:41:08,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:08,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:08,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:08,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:08,813 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:09,070 INFO L93 Difference]: Finished difference Result 525 states and 1574 transitions. [2021-07-13 19:41:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:09,071 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:41:09,071 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:41:09,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:41:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2021-07-13 19:41:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.091715976331361) internal successors, (1045), 338 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1045 transitions. [2021-07-13 19:41:09,075 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1045 transitions. Word has length 20 [2021-07-13 19:41:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:09,075 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1045 transitions. [2021-07-13 19:41:09,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1045 transitions. [2021-07-13 19:41:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:09,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:09,076 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:09,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:09,276 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 185 times [2021-07-13 19:41:09,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:09,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900903043] [2021-07-13 19:41:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:09,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:09,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900903043] [2021-07-13 19:41:09,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900903043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:09,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098614856] [2021-07-13 19:41:09,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:09,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:09,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:09,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098614856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805260695] [2021-07-13 19:41:09,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:09,589 INFO L87 Difference]: Start difference. First operand 339 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:10,071 INFO L93 Difference]: Finished difference Result 550 states and 1626 transitions. [2021-07-13 19:41:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:10,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:10,072 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:41:10,073 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:41:10,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:41:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 349. [2021-07-13 19:41:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0804597701149423) internal successors, (1072), 348 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-07-13 19:41:10,077 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:10,077 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-07-13 19:41:10,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-07-13 19:41:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:10,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:10,078 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:10,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:10,278 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 186 times [2021-07-13 19:41:10,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:10,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082105139] [2021-07-13 19:41:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082105139] [2021-07-13 19:41:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082105139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912063157] [2021-07-13 19:41:10,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:10,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:10,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912063157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:10,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:10,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212206897] [2021-07-13 19:41:10,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:10,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:10,569 INFO L87 Difference]: Start difference. First operand 349 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:10,857 INFO L93 Difference]: Finished difference Result 521 states and 1572 transitions. [2021-07-13 19:41:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:10,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:10,858 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:41:10,858 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:41:10,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:41:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 336. [2021-07-13 19:41:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.08955223880597) internal successors, (1035), 335 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-07-13 19:41:10,862 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-07-13 19:41:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-07-13 19:41:10,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-07-13 19:41:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:10,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:10,863 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:11,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,063 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 187 times [2021-07-13 19:41:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:11,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654118542] [2021-07-13 19:41:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654118542] [2021-07-13 19:41:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654118542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706149339] [2021-07-13 19:41:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:11,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706149339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:11,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:11,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566930713] [2021-07-13 19:41:11,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:11,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:11,299 INFO L87 Difference]: Start difference. First operand 336 states and 1035 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:11,594 INFO L93 Difference]: Finished difference Result 615 states and 1779 transitions. [2021-07-13 19:41:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:11,596 INFO L225 Difference]: With dead ends: 615 [2021-07-13 19:41:11,596 INFO L226 Difference]: Without dead ends: 597 [2021-07-13 19:41:11,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-13 19:41:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 338. [2021-07-13 19:41:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.086053412462908) internal successors, (1040), 337 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1040 transitions. [2021-07-13 19:41:11,600 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:11,600 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1040 transitions. [2021-07-13 19:41:11,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1040 transitions. [2021-07-13 19:41:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:11,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:11,601 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-07-13 19:41:11,801 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 188 times [2021-07-13 19:41:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:11,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27225336] [2021-07-13 19:41:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27225336] [2021-07-13 19:41:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27225336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316577240] [2021-07-13 19:41:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:11,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316577240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:12,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:12,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889431026] [2021-07-13 19:41:12,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:12,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:12,053 INFO L87 Difference]: Start difference. First operand 338 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:12,390 INFO L93 Difference]: Finished difference Result 576 states and 1700 transitions. [2021-07-13 19:41:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:12,392 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:41:12,392 INFO L226 Difference]: Without dead ends: 564 [2021-07-13 19:41:12,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-13 19:41:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-07-13 19:41:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0825958702064895) internal successors, (1045), 339 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-07-13 19:41:12,397 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-07-13 19:41:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:12,397 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-07-13 19:41:12,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-07-13 19:41:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:12,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:12,398 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:12,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,599 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 189 times [2021-07-13 19:41:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:12,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095959679] [2021-07-13 19:41:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095959679] [2021-07-13 19:41:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095959679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122199044] [2021-07-13 19:41:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122199044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:12,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:12,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537583377] [2021-07-13 19:41:12,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:12,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:12,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:12,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:12,895 INFO L87 Difference]: Start difference. First operand 340 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:13,393 INFO L93 Difference]: Finished difference Result 601 states and 1752 transitions. [2021-07-13 19:41:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:13,395 INFO L225 Difference]: With dead ends: 601 [2021-07-13 19:41:13,395 INFO L226 Difference]: Without dead ends: 595 [2021-07-13 19:41:13,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-13 19:41:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 350. [2021-07-13 19:41:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0716332378223496) internal successors, (1072), 349 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1072 transitions. [2021-07-13 19:41:13,403 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:13,404 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1072 transitions. [2021-07-13 19:41:13,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1072 transitions. [2021-07-13 19:41:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:13,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:13,404 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:13,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-07-13 19:41:13,617 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 190 times [2021-07-13 19:41:13,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:13,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879464830] [2021-07-13 19:41:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:13,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:13,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879464830] [2021-07-13 19:41:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879464830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:13,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910213186] [2021-07-13 19:41:13,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:13,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:13,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910213186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:13,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760064091] [2021-07-13 19:41:13,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:13,905 INFO L87 Difference]: Start difference. First operand 350 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:14,207 INFO L93 Difference]: Finished difference Result 572 states and 1698 transitions. [2021-07-13 19:41:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:14,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:14,208 INFO L225 Difference]: With dead ends: 572 [2021-07-13 19:41:14,209 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:41:14,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:41:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 335. [2021-07-13 19:41:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0838323353293413) internal successors, (1030), 334 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-07-13 19:41:14,213 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-07-13 19:41:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:14,213 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-07-13 19:41:14,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-07-13 19:41:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:14,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:14,214 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:14,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1889 [2021-07-13 19:41:14,414 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 191 times [2021-07-13 19:41:14,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:14,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953594158] [2021-07-13 19:41:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:14,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953594158] [2021-07-13 19:41:14,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953594158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022275772] [2021-07-13 19:41:14,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:14,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:14,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022275772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:14,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:14,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579475168] [2021-07-13 19:41:14,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:14,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:14,698 INFO L87 Difference]: Start difference. First operand 335 states and 1030 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:14,927 INFO L93 Difference]: Finished difference Result 433 states and 1285 transitions. [2021-07-13 19:41:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:14,928 INFO L225 Difference]: With dead ends: 433 [2021-07-13 19:41:14,928 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:41:14,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:41:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 343. [2021-07-13 19:41:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1023391812865495) internal successors, (1061), 342 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-07-13 19:41:14,932 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-07-13 19:41:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:14,932 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-07-13 19:41:14,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-07-13 19:41:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:14,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:14,933 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,133 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 192 times [2021-07-13 19:41:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095915110] [2021-07-13 19:41:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095915110] [2021-07-13 19:41:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095915110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537608512] [2021-07-13 19:41:15,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537608512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:15,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:15,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047540367] [2021-07-13 19:41:15,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:15,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:15,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:15,403 INFO L87 Difference]: Start difference. First operand 343 states and 1061 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:15,634 INFO L93 Difference]: Finished difference Result 439 states and 1292 transitions. [2021-07-13 19:41:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:15,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:15,635 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:41:15,635 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:41:15,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:41:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 340. [2021-07-13 19:41:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-13 19:41:15,639 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-13 19:41:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:15,639 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-13 19:41:15,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-13 19:41:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:15,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:15,639 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,840 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 193 times [2021-07-13 19:41:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548916808] [2021-07-13 19:41:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:15,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548916808] [2021-07-13 19:41:15,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548916808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125206250] [2021-07-13 19:41:15,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125206250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:16,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911714833] [2021-07-13 19:41:16,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:16,093 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:16,324 INFO L93 Difference]: Finished difference Result 403 states and 1210 transitions. [2021-07-13 19:41:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:16,325 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:41:16,325 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:41:16,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:41:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-07-13 19:41:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0922619047619047) internal successors, (1039), 336 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-07-13 19:41:16,329 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-07-13 19:41:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:16,329 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-07-13 19:41:16,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-07-13 19:41:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:16,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:16,330 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:16,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:16,530 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 194 times [2021-07-13 19:41:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:16,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231203114] [2021-07-13 19:41:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:16,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231203114] [2021-07-13 19:41:16,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231203114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319335248] [2021-07-13 19:41:16,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:16,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319335248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:16,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935060779] [2021-07-13 19:41:16,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:16,900 INFO L87 Difference]: Start difference. First operand 337 states and 1039 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:17,158 INFO L93 Difference]: Finished difference Result 520 states and 1503 transitions. [2021-07-13 19:41:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:17,159 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:41:17,159 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:41:17,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:41:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-07-13 19:41:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.125) internal successors, (1075), 344 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1075 transitions. [2021-07-13 19:41:17,164 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1075 transitions. Word has length 20 [2021-07-13 19:41:17,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:17,164 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1075 transitions. [2021-07-13 19:41:17,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1075 transitions. [2021-07-13 19:41:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:17,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:17,165 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:17,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-07-13 19:41:17,365 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 195 times [2021-07-13 19:41:17,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:17,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258794545] [2021-07-13 19:41:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:17,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258794545] [2021-07-13 19:41:17,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258794545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35857813] [2021-07-13 19:41:17,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:17,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:17,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:17,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35857813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118729946] [2021-07-13 19:41:17,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:17,617 INFO L87 Difference]: Start difference. First operand 345 states and 1075 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:17,909 INFO L93 Difference]: Finished difference Result 526 states and 1504 transitions. [2021-07-13 19:41:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:17,910 INFO L225 Difference]: With dead ends: 526 [2021-07-13 19:41:17,910 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:41:17,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:41:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2021-07-13 19:41:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.1037463976945245) internal successors, (1077), 347 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1077 transitions. [2021-07-13 19:41:17,914 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1077 transitions. Word has length 20 [2021-07-13 19:41:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:17,915 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1077 transitions. [2021-07-13 19:41:17,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1077 transitions. [2021-07-13 19:41:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:17,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:17,915 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:18,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,116 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 196 times [2021-07-13 19:41:18,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:18,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617630793] [2021-07-13 19:41:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617630793] [2021-07-13 19:41:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617630793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107262919] [2021-07-13 19:41:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:18,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:18,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107262919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:18,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:18,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231395982] [2021-07-13 19:41:18,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:18,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:18,392 INFO L87 Difference]: Start difference. First operand 348 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:18,568 INFO L93 Difference]: Finished difference Result 488 states and 1424 transitions. [2021-07-13 19:41:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:18,569 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:41:18,569 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:41:18,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:41:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 341. [2021-07-13 19:41:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.114705882352941) internal successors, (1059), 340 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-07-13 19:41:18,573 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-07-13 19:41:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:18,574 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-07-13 19:41:18,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-07-13 19:41:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:18,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:18,574 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:18,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,775 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 197 times [2021-07-13 19:41:18,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:18,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421300748] [2021-07-13 19:41:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421300748] [2021-07-13 19:41:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421300748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600560931] [2021-07-13 19:41:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600560931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:19,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276818783] [2021-07-13 19:41:19,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:19,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:19,083 INFO L87 Difference]: Start difference. First operand 341 states and 1059 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:19,286 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-07-13 19:41:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:19,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:19,287 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:41:19,287 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:41:19,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:41:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 338. [2021-07-13 19:41:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0979228486646884) internal successors, (1044), 337 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-07-13 19:41:19,291 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-07-13 19:41:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:19,291 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-07-13 19:41:19,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-07-13 19:41:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:19,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:19,292 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1957 [2021-07-13 19:41:19,493 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 198 times [2021-07-13 19:41:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928315602] [2021-07-13 19:41:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928315602] [2021-07-13 19:41:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928315602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541163459] [2021-07-13 19:41:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:19,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541163459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:19,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616217378] [2021-07-13 19:41:19,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:19,797 INFO L87 Difference]: Start difference. First operand 338 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:20,072 INFO L93 Difference]: Finished difference Result 488 states and 1416 transitions. [2021-07-13 19:41:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:20,073 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:41:20,073 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:41:20,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:41:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 348. [2021-07-13 19:41:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.086455331412104) internal successors, (1071), 347 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1071 transitions. [2021-07-13 19:41:20,077 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1071 transitions. Word has length 20 [2021-07-13 19:41:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1071 transitions. [2021-07-13 19:41:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1071 transitions. [2021-07-13 19:41:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:20,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:20,078 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:20,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-07-13 19:41:20,278 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:20,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 199 times [2021-07-13 19:41:20,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:20,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25299453] [2021-07-13 19:41:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:20,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25299453] [2021-07-13 19:41:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25299453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514923760] [2021-07-13 19:41:20,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:20,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514923760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:20,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:20,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:20,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845725234] [2021-07-13 19:41:20,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:20,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:20,535 INFO L87 Difference]: Start difference. First operand 348 states and 1071 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:20,841 INFO L93 Difference]: Finished difference Result 465 states and 1377 transitions. [2021-07-13 19:41:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:20,842 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:41:20,843 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:41:20,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:41:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 337. [2021-07-13 19:41:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0922619047619047) internal successors, (1039), 336 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-07-13 19:41:20,847 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-07-13 19:41:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:20,847 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-07-13 19:41:20,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-07-13 19:41:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:20,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:20,847 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:21,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-07-13 19:41:21,048 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 200 times [2021-07-13 19:41:21,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:21,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078021149] [2021-07-13 19:41:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078021149] [2021-07-13 19:41:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078021149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763099716] [2021-07-13 19:41:21,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763099716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:21,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939960178] [2021-07-13 19:41:21,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:21,323 INFO L87 Difference]: Start difference. First operand 337 states and 1039 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:21,570 INFO L93 Difference]: Finished difference Result 405 states and 1214 transitions. [2021-07-13 19:41:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:21,571 INFO L225 Difference]: With dead ends: 405 [2021-07-13 19:41:21,571 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:41:21,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:41:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2021-07-13 19:41:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.088757396449704) internal successors, (1044), 338 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1044 transitions. [2021-07-13 19:41:21,574 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1044 transitions. Word has length 20 [2021-07-13 19:41:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:21,574 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1044 transitions. [2021-07-13 19:41:21,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1044 transitions. [2021-07-13 19:41:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:21,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:21,575 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:21,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:21,775 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:21,776 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 201 times [2021-07-13 19:41:21,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:21,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496152064] [2021-07-13 19:41:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:21,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496152064] [2021-07-13 19:41:21,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496152064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259041452] [2021-07-13 19:41:21,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:21,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259041452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:22,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:22,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942936973] [2021-07-13 19:41:22,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:22,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:22,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:22,086 INFO L87 Difference]: Start difference. First operand 339 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:22,380 INFO L93 Difference]: Finished difference Result 430 states and 1266 transitions. [2021-07-13 19:41:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:22,381 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:41:22,381 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:41:22,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:41:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-07-13 19:41:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0775862068965516) internal successors, (1071), 348 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2021-07-13 19:41:22,385 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2021-07-13 19:41:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:22,385 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2021-07-13 19:41:22,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2021-07-13 19:41:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:22,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:22,386 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:22,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-07-13 19:41:22,586 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:22,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 202 times [2021-07-13 19:41:22,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:22,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487929413] [2021-07-13 19:41:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:22,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487929413] [2021-07-13 19:41:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487929413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719917361] [2021-07-13 19:41:22,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:22,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719917361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:22,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23019266] [2021-07-13 19:41:22,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:22,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:22,855 INFO L87 Difference]: Start difference. First operand 349 states and 1071 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:23,042 INFO L93 Difference]: Finished difference Result 401 states and 1212 transitions. [2021-07-13 19:41:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:23,043 INFO L225 Difference]: With dead ends: 401 [2021-07-13 19:41:23,043 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:41:23,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:41:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 336. [2021-07-13 19:41:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0865671641791046) internal successors, (1034), 335 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-07-13 19:41:23,047 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-07-13 19:41:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:23,047 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-07-13 19:41:23,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-07-13 19:41:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:23,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:23,047 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:23,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:23,248 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 203 times [2021-07-13 19:41:23,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:23,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111705239] [2021-07-13 19:41:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111705239] [2021-07-13 19:41:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111705239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377432553] [2021-07-13 19:41:23,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:23,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:23,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377432553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:23,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:23,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140639548] [2021-07-13 19:41:23,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:23,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:23,500 INFO L87 Difference]: Start difference. First operand 336 states and 1034 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:23,753 INFO L93 Difference]: Finished difference Result 475 states and 1405 transitions. [2021-07-13 19:41:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:23,754 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:41:23,754 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:41:23,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:41:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 346. [2021-07-13 19:41:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.127536231884058) internal successors, (1079), 345 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1079 transitions. [2021-07-13 19:41:23,759 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1079 transitions. Word has length 20 [2021-07-13 19:41:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:23,759 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1079 transitions. [2021-07-13 19:41:23,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1079 transitions. [2021-07-13 19:41:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:23,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:23,759 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:23,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-07-13 19:41:23,964 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 204 times [2021-07-13 19:41:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:23,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525196832] [2021-07-13 19:41:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:24,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525196832] [2021-07-13 19:41:24,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525196832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381524015] [2021-07-13 19:41:24,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:24,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:24,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381524015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:24,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353639586] [2021-07-13 19:41:24,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:24,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:24,205 INFO L87 Difference]: Start difference. First operand 346 states and 1079 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:24,438 INFO L93 Difference]: Finished difference Result 481 states and 1406 transitions. [2021-07-13 19:41:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:24,439 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:41:24,440 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:41:24,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:41:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 349. [2021-07-13 19:41:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-13 19:41:24,444 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-13 19:41:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-13 19:41:24,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-13 19:41:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:24,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:24,445 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:24,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,645 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 205 times [2021-07-13 19:41:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:24,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550101290] [2021-07-13 19:41:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:24,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550101290] [2021-07-13 19:41:24,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550101290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537346103] [2021-07-13 19:41:24,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537346103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:24,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799291873] [2021-07-13 19:41:24,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:24,890 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:25,115 INFO L93 Difference]: Finished difference Result 533 states and 1548 transitions. [2021-07-13 19:41:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:25,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:25,116 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:41:25,116 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 19:41:25,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 19:41:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 352. [2021-07-13 19:41:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1225071225071224) internal successors, (1096), 351 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1096 transitions. [2021-07-13 19:41:25,121 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1096 transitions. Word has length 20 [2021-07-13 19:41:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:25,121 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1096 transitions. [2021-07-13 19:41:25,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1096 transitions. [2021-07-13 19:41:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:25,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:25,122 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:25,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2033,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:25,322 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 206 times [2021-07-13 19:41:25,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:25,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706612217] [2021-07-13 19:41:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:25,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:25,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706612217] [2021-07-13 19:41:25,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706612217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:25,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110828197] [2021-07-13 19:41:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:25,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:25,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:25,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:25,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110828197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:25,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:25,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:25,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880248406] [2021-07-13 19:41:25,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:25,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:25,576 INFO L87 Difference]: Start difference. First operand 352 states and 1096 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:25,810 INFO L93 Difference]: Finished difference Result 496 states and 1466 transitions. [2021-07-13 19:41:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:25,811 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:41:25,811 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:41:25,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:41:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 349. [2021-07-13 19:41:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-13 19:41:25,816 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-13 19:41:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:25,816 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-13 19:41:25,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-13 19:41:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:25,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:25,816 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:26,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,017 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 207 times [2021-07-13 19:41:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536784042] [2021-07-13 19:41:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536784042] [2021-07-13 19:41:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536784042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230016015] [2021-07-13 19:41:26,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:26,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:26,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230016015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:26,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:26,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443085838] [2021-07-13 19:41:26,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:26,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:26,272 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:26,531 INFO L93 Difference]: Finished difference Result 521 states and 1500 transitions. [2021-07-13 19:41:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:26,532 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:41:26,532 INFO L226 Difference]: Without dead ends: 515 [2021-07-13 19:41:26,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-13 19:41:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 353. [2021-07-13 19:41:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1107954545454546) internal successors, (1095), 352 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-07-13 19:41:26,536 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-07-13 19:41:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:26,536 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-07-13 19:41:26,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-07-13 19:41:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:26,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:26,537 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:26,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,737 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 208 times [2021-07-13 19:41:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:26,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825906042] [2021-07-13 19:41:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:26,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825906042] [2021-07-13 19:41:26,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825906042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361433473] [2021-07-13 19:41:26,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:26,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361433473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:26,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215373247] [2021-07-13 19:41:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:26,993 INFO L87 Difference]: Start difference. First operand 353 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:27,306 INFO L93 Difference]: Finished difference Result 527 states and 1521 transitions. [2021-07-13 19:41:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:27,307 INFO L225 Difference]: With dead ends: 527 [2021-07-13 19:41:27,307 INFO L226 Difference]: Without dead ends: 527 [2021-07-13 19:41:27,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-13 19:41:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 350. [2021-07-13 19:41:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.108882521489971) internal successors, (1085), 349 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1085 transitions. [2021-07-13 19:41:27,312 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1085 transitions. Word has length 20 [2021-07-13 19:41:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1085 transitions. [2021-07-13 19:41:27,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1085 transitions. [2021-07-13 19:41:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:27,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:27,313 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:27,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,513 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 209 times [2021-07-13 19:41:27,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:27,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368151073] [2021-07-13 19:41:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368151073] [2021-07-13 19:41:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368151073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712899393] [2021-07-13 19:41:27,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712899393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:27,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:27,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856967502] [2021-07-13 19:41:27,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:27,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:27,750 INFO L87 Difference]: Start difference. First operand 350 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:28,046 INFO L93 Difference]: Finished difference Result 457 states and 1366 transitions. [2021-07-13 19:41:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:28,047 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:41:28,047 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:41:28,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:41:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 351. [2021-07-13 19:41:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.105714285714286) internal successors, (1087), 350 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1087 transitions. [2021-07-13 19:41:28,051 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1087 transitions. Word has length 20 [2021-07-13 19:41:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:28,051 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1087 transitions. [2021-07-13 19:41:28,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1087 transitions. [2021-07-13 19:41:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:28,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:28,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:28,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:28,252 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 210 times [2021-07-13 19:41:28,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:28,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88138083] [2021-07-13 19:41:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88138083] [2021-07-13 19:41:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88138083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154640226] [2021-07-13 19:41:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:28,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:28,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:28,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154640226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:28,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353562073] [2021-07-13 19:41:28,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:28,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:28,518 INFO L87 Difference]: Start difference. First operand 351 states and 1087 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:28,816 INFO L93 Difference]: Finished difference Result 445 states and 1333 transitions. [2021-07-13 19:41:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:28,817 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:41:28,817 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:41:28,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:41:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 340. [2021-07-13 19:41:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-13 19:41:28,821 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-13 19:41:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:28,821 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-13 19:41:28,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-13 19:41:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:28,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:28,822 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:29,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2079,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,022 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 211 times [2021-07-13 19:41:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136919752] [2021-07-13 19:41:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136919752] [2021-07-13 19:41:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136919752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539423906] [2021-07-13 19:41:29,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539423906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:29,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978974335] [2021-07-13 19:41:29,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:29,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:29,250 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:29,513 INFO L93 Difference]: Finished difference Result 400 states and 1211 transitions. [2021-07-13 19:41:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:29,514 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:41:29,514 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:41:29,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:41:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 337. [2021-07-13 19:41:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0892857142857144) internal successors, (1038), 336 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1038 transitions. [2021-07-13 19:41:29,518 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1038 transitions. Word has length 20 [2021-07-13 19:41:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1038 transitions. [2021-07-13 19:41:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1038 transitions. [2021-07-13 19:41:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:29,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:29,518 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:29,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,719 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 212 times [2021-07-13 19:41:29,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:29,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708382226] [2021-07-13 19:41:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708382226] [2021-07-13 19:41:29,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708382226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626876915] [2021-07-13 19:41:29,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626876915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:29,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:29,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714974366] [2021-07-13 19:41:29,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:29,969 INFO L87 Difference]: Start difference. First operand 337 states and 1038 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:30,264 INFO L93 Difference]: Finished difference Result 445 states and 1305 transitions. [2021-07-13 19:41:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:30,265 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:41:30,265 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:41:30,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:41:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 351. [2021-07-13 19:41:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.077142857142857) internal successors, (1077), 350 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1077 transitions. [2021-07-13 19:41:30,269 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1077 transitions. Word has length 20 [2021-07-13 19:41:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:30,270 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1077 transitions. [2021-07-13 19:41:30,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1077 transitions. [2021-07-13 19:41:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:30,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:30,270 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:30,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:30,470 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 213 times [2021-07-13 19:41:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:30,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355443432] [2021-07-13 19:41:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355443432] [2021-07-13 19:41:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355443432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605493475] [2021-07-13 19:41:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:30,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:30,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605493475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:30,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:30,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:30,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179700581] [2021-07-13 19:41:30,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:30,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:30,722 INFO L87 Difference]: Start difference. First operand 351 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:30,966 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-07-13 19:41:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:30,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:30,967 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:41:30,967 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:41:30,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:41:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2021-07-13 19:41:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0804597701149423) internal successors, (1072), 348 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-07-13 19:41:30,971 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:30,971 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-07-13 19:41:30,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-07-13 19:41:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:30,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:30,971 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-07-13 19:41:31,172 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 214 times [2021-07-13 19:41:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159790293] [2021-07-13 19:41:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:31,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159790293] [2021-07-13 19:41:31,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159790293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832828123] [2021-07-13 19:41:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:31,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832828123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:31,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:31,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529900027] [2021-07-13 19:41:31,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:31,423 INFO L87 Difference]: Start difference. First operand 349 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:31,694 INFO L93 Difference]: Finished difference Result 420 states and 1261 transitions. [2021-07-13 19:41:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:31,695 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:41:31,695 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 19:41:31,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 19:41:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 336. [2021-07-13 19:41:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0865671641791046) internal successors, (1034), 335 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-07-13 19:41:31,699 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-07-13 19:41:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:31,699 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-07-13 19:41:31,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-07-13 19:41:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:31,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:31,700 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-07-13 19:41:31,900 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 215 times [2021-07-13 19:41:31,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020687507] [2021-07-13 19:41:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020687507] [2021-07-13 19:41:31,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020687507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623850110] [2021-07-13 19:41:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:32,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623850110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:32,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:32,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396583477] [2021-07-13 19:41:32,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:32,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:32,118 INFO L87 Difference]: Start difference. First operand 336 states and 1034 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,307 INFO L93 Difference]: Finished difference Result 394 states and 1182 transitions. [2021-07-13 19:41:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:32,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,308 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:41:32,308 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:41:32,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:41:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 340. [2021-07-13 19:41:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.079646017699115) internal successors, (1044), 339 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1044 transitions. [2021-07-13 19:41:32,312 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1044 transitions. Word has length 20 [2021-07-13 19:41:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,312 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1044 transitions. [2021-07-13 19:41:32,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1044 transitions. [2021-07-13 19:41:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:32,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,313 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:32,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:32,513 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 216 times [2021-07-13 19:41:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:32,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23571628] [2021-07-13 19:41:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23571628] [2021-07-13 19:41:32,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23571628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137183048] [2021-07-13 19:41:32,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:32,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137183048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:32,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100610114] [2021-07-13 19:41:32,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:32,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:32,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:32,730 INFO L87 Difference]: Start difference. First operand 340 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,931 INFO L93 Difference]: Finished difference Result 419 states and 1234 transitions. [2021-07-13 19:41:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:32,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,932 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:41:32,932 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 19:41:32,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 19:41:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 350. [2021-07-13 19:41:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0687679083094554) internal successors, (1071), 349 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1071 transitions. [2021-07-13 19:41:32,937 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1071 transitions. Word has length 20 [2021-07-13 19:41:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,937 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1071 transitions. [2021-07-13 19:41:32,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1071 transitions. [2021-07-13 19:41:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:32,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,937 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:33,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2125 [2021-07-13 19:41:33,138 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:33,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 217 times [2021-07-13 19:41:33,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:33,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720348222] [2021-07-13 19:41:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:33,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720348222] [2021-07-13 19:41:33,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720348222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98400711] [2021-07-13 19:41:33,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98400711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:33,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968783821] [2021-07-13 19:41:33,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:33,387 INFO L87 Difference]: Start difference. First operand 350 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:33,567 INFO L93 Difference]: Finished difference Result 390 states and 1180 transitions. [2021-07-13 19:41:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:33,568 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:41:33,568 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:41:33,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:41:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2021-07-13 19:41:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.083086053412463) internal successors, (1039), 337 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1039 transitions. [2021-07-13 19:41:33,572 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1039 transitions. Word has length 20 [2021-07-13 19:41:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:33,572 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1039 transitions. [2021-07-13 19:41:33,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1039 transitions. [2021-07-13 19:41:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:33,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:33,572 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:33,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,789 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 218 times [2021-07-13 19:41:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:33,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095470870] [2021-07-13 19:41:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:33,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095470870] [2021-07-13 19:41:33,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095470870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549133908] [2021-07-13 19:41:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549133908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:34,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900911471] [2021-07-13 19:41:34,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:34,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:34,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:34,024 INFO L87 Difference]: Start difference. First operand 338 states and 1039 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:34,230 INFO L93 Difference]: Finished difference Result 425 states and 1249 transitions. [2021-07-13 19:41:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:34,231 INFO L225 Difference]: With dead ends: 425 [2021-07-13 19:41:34,231 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:41:34,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:41:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 352. [2021-07-13 19:41:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0712250712250713) internal successors, (1078), 351 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1078 transitions. [2021-07-13 19:41:34,235 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1078 transitions. Word has length 20 [2021-07-13 19:41:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:34,235 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1078 transitions. [2021-07-13 19:41:34,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1078 transitions. [2021-07-13 19:41:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:34,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:34,236 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:34,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2135,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,440 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 219 times [2021-07-13 19:41:34,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:34,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411604888] [2021-07-13 19:41:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:34,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411604888] [2021-07-13 19:41:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411604888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728213437] [2021-07-13 19:41:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728213437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:34,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290401529] [2021-07-13 19:41:34,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:34,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:34,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:34,660 INFO L87 Difference]: Start difference. First operand 352 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:34,874 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2021-07-13 19:41:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:34,875 INFO L225 Difference]: With dead ends: 425 [2021-07-13 19:41:34,875 INFO L226 Difference]: Without dead ends: 425 [2021-07-13 19:41:34,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-13 19:41:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2021-07-13 19:41:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0744985673352434) internal successors, (1073), 349 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1073 transitions. [2021-07-13 19:41:34,880 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1073 transitions. Word has length 20 [2021-07-13 19:41:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:34,880 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1073 transitions. [2021-07-13 19:41:34,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1073 transitions. [2021-07-13 19:41:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:34,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:34,880 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:35,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:35,081 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 220 times [2021-07-13 19:41:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:35,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139653565] [2021-07-13 19:41:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:35,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139653565] [2021-07-13 19:41:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139653565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074937502] [2021-07-13 19:41:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:35,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:35,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074937502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:35,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:35,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:35,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544759536] [2021-07-13 19:41:35,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:35,277 INFO L87 Difference]: Start difference. First operand 350 states and 1073 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:35,528 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-07-13 19:41:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:35,529 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:41:35,529 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:41:35,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:41:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 335. [2021-07-13 19:41:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0838323353293413) internal successors, (1030), 334 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-07-13 19:41:35,533 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-07-13 19:41:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:35,533 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-07-13 19:41:35,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-07-13 19:41:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:35,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:35,534 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:35,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:35,734 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 221 times [2021-07-13 19:41:35,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:35,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848774705] [2021-07-13 19:41:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:35,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848774705] [2021-07-13 19:41:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848774705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994474874] [2021-07-13 19:41:35,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:35,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:35,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:35,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994474874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:35,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:35,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:35,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975475205] [2021-07-13 19:41:35,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:35,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:35,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:35,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:35,928 INFO L87 Difference]: Start difference. First operand 335 states and 1030 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:36,118 INFO L93 Difference]: Finished difference Result 458 states and 1340 transitions. [2021-07-13 19:41:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:36,119 INFO L225 Difference]: With dead ends: 458 [2021-07-13 19:41:36,119 INFO L226 Difference]: Without dead ends: 440 [2021-07-13 19:41:36,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-13 19:41:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2021-07-13 19:41:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.076923076923077) internal successors, (1040), 338 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-07-13 19:41:36,123 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:36,123 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-07-13 19:41:36,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-07-13 19:41:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:36,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:36,124 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:36,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-07-13 19:41:36,337 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 222 times [2021-07-13 19:41:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:36,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920322085] [2021-07-13 19:41:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:36,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920322085] [2021-07-13 19:41:36,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920322085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458466999] [2021-07-13 19:41:36,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:36,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:36,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458466999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999846425] [2021-07-13 19:41:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:36,555 INFO L87 Difference]: Start difference. First operand 339 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:36,735 INFO L93 Difference]: Finished difference Result 454 states and 1332 transitions. [2021-07-13 19:41:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:36,736 INFO L225 Difference]: With dead ends: 454 [2021-07-13 19:41:36,736 INFO L226 Difference]: Without dead ends: 442 [2021-07-13 19:41:36,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-13 19:41:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-07-13 19:41:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.073529411764706) internal successors, (1045), 340 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-07-13 19:41:36,740 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-07-13 19:41:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:36,740 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-07-13 19:41:36,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-07-13 19:41:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:36,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:36,740 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:36,941 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 223 times [2021-07-13 19:41:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489287854] [2021-07-13 19:41:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:36,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489287854] [2021-07-13 19:41:36,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489287854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578550838] [2021-07-13 19:41:36,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578550838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:37,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:37,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995513029] [2021-07-13 19:41:37,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:37,165 INFO L87 Difference]: Start difference. First operand 341 states and 1045 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:37,477 INFO L93 Difference]: Finished difference Result 479 states and 1384 transitions. [2021-07-13 19:41:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:37,478 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:41:37,478 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:41:37,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:41:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 351. [2021-07-13 19:41:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0628571428571427) internal successors, (1072), 350 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-07-13 19:41:37,483 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:37,483 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-07-13 19:41:37,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-07-13 19:41:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:37,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:37,483 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:37,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-07-13 19:41:37,684 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 224 times [2021-07-13 19:41:37,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:37,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991172470] [2021-07-13 19:41:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:37,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991172470] [2021-07-13 19:41:37,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991172470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004535202] [2021-07-13 19:41:37,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004535202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:37,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415636962] [2021-07-13 19:41:37,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:37,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:37,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:37,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:37,906 INFO L87 Difference]: Start difference. First operand 351 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:38,094 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-07-13 19:41:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:38,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:38,095 INFO L225 Difference]: With dead ends: 450 [2021-07-13 19:41:38,095 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:41:38,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:41:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 337. [2021-07-13 19:41:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-13 19:41:38,099 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-13 19:41:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:38,099 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-13 19:41:38,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-13 19:41:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:38,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:38,100 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:38,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2164,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:38,300 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:38,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 225 times [2021-07-13 19:41:38,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:38,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192756422] [2021-07-13 19:41:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:38,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:38,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192756422] [2021-07-13 19:41:38,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192756422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:38,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434744626] [2021-07-13 19:41:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:38,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:38,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434744626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:38,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:38,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:38,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075278115] [2021-07-13 19:41:38,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:38,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:38,498 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:38,653 INFO L93 Difference]: Finished difference Result 391 states and 1173 transitions. [2021-07-13 19:41:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:38,654 INFO L225 Difference]: With dead ends: 391 [2021-07-13 19:41:38,654 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:41:38,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:41:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-07-13 19:41:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.073529411764706) internal successors, (1045), 340 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-07-13 19:41:38,658 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-07-13 19:41:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:38,658 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-07-13 19:41:38,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-07-13 19:41:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:38,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:38,659 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:38,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2168,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:38,859 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 226 times [2021-07-13 19:41:38,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:38,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178211915] [2021-07-13 19:41:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:38,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:38,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178211915] [2021-07-13 19:41:38,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178211915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:38,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871410201] [2021-07-13 19:41:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:38,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871410201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:39,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356087773] [2021-07-13 19:41:39,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:39,067 INFO L87 Difference]: Start difference. First operand 341 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:39,247 INFO L93 Difference]: Finished difference Result 416 states and 1225 transitions. [2021-07-13 19:41:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:39,248 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:41:39,248 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 19:41:39,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 19:41:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 351. [2021-07-13 19:41:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0628571428571427) internal successors, (1072), 350 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-07-13 19:41:39,252 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-07-13 19:41:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:39,252 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-07-13 19:41:39,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-07-13 19:41:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:39,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:39,252 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:39,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:39,453 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 227 times [2021-07-13 19:41:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:39,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277067002] [2021-07-13 19:41:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277067002] [2021-07-13 19:41:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277067002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467133713] [2021-07-13 19:41:39,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:39,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467133713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:39,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:39,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774401634] [2021-07-13 19:41:39,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:39,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:39,653 INFO L87 Difference]: Start difference. First operand 351 states and 1072 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:39,797 INFO L93 Difference]: Finished difference Result 387 states and 1171 transitions. [2021-07-13 19:41:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:39,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:39,798 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:41:39,798 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:41:39,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:41:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2021-07-13 19:41:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.076923076923077) internal successors, (1040), 338 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-07-13 19:41:39,802 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:39,802 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-07-13 19:41:39,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-07-13 19:41:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:39,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:39,803 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:40,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-07-13 19:41:40,003 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 228 times [2021-07-13 19:41:40,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:40,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671058611] [2021-07-13 19:41:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671058611] [2021-07-13 19:41:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671058611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86726666] [2021-07-13 19:41:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:40,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86726666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121059342] [2021-07-13 19:41:40,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:40,194 INFO L87 Difference]: Start difference. First operand 339 states and 1040 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:40,397 INFO L93 Difference]: Finished difference Result 420 states and 1235 transitions. [2021-07-13 19:41:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:40,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:40,398 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:41:40,398 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:41:40,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:41:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2021-07-13 19:41:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.065340909090909) internal successors, (1079), 352 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1079 transitions. [2021-07-13 19:41:40,402 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1079 transitions. Word has length 20 [2021-07-13 19:41:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:40,402 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1079 transitions. [2021-07-13 19:41:40,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1079 transitions. [2021-07-13 19:41:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:40,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:40,403 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:40,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-07-13 19:41:40,603 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 229 times [2021-07-13 19:41:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232091928] [2021-07-13 19:41:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232091928] [2021-07-13 19:41:40,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232091928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500954487] [2021-07-13 19:41:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:40,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500954487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:40,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927094651] [2021-07-13 19:41:40,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:40,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:40,789 INFO L87 Difference]: Start difference. First operand 353 states and 1079 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:40,949 INFO L93 Difference]: Finished difference Result 420 states and 1241 transitions. [2021-07-13 19:41:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:41:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:40,950 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:41:40,950 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 19:41:40,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 19:41:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 351. [2021-07-13 19:41:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0685714285714285) internal successors, (1074), 350 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1074 transitions. [2021-07-13 19:41:40,954 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1074 transitions. Word has length 20 [2021-07-13 19:41:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:40,954 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1074 transitions. [2021-07-13 19:41:40,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1074 transitions. [2021-07-13 19:41:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:40,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:40,954 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:41,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,155 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 230 times [2021-07-13 19:41:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:41,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539826282] [2021-07-13 19:41:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:41,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539826282] [2021-07-13 19:41:41,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539826282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119702595] [2021-07-13 19:41:41,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119702595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:41,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:41:41,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250768272] [2021-07-13 19:41:41,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:41:41,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:41,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:41:41,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:41:41,333 INFO L87 Difference]: Start difference. First operand 351 states and 1074 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:41,499 INFO L93 Difference]: Finished difference Result 395 states and 1191 transitions. [2021-07-13 19:41:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:41,500 INFO L225 Difference]: With dead ends: 395 [2021-07-13 19:41:41,500 INFO L226 Difference]: Without dead ends: 395 [2021-07-13 19:41:41,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-13 19:41:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 337. [2021-07-13 19:41:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-13 19:41:41,504 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-13 19:41:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:41,504 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-13 19:41:41,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-13 19:41:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:41,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:41,504 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:41,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,705 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash 915807584, now seen corresponding path program 231 times [2021-07-13 19:41:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:41,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873619687] [2021-07-13 19:41:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873619687] [2021-07-13 19:41:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873619687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095475673] [2021-07-13 19:41:41,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:41,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:41,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:41,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:41,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:41,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,868 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:41:41,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:41,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:41:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095475673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:41:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099644907] [2021-07-13 19:41:41,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:41,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:41,909 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:42,092 INFO L93 Difference]: Finished difference Result 436 states and 1297 transitions. [2021-07-13 19:41:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:42,093 INFO L225 Difference]: With dead ends: 436 [2021-07-13 19:41:42,093 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:41:42,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:41:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 332. [2021-07-13 19:41:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.066465256797583) internal successors, (1015), 331 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-07-13 19:41:42,097 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-07-13 19:41:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:42,097 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-07-13 19:41:42,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-07-13 19:41:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:42,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:42,098 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:42,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-07-13 19:41:42,298 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 232 times [2021-07-13 19:41:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:42,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366397640] [2021-07-13 19:41:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366397640] [2021-07-13 19:41:42,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366397640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108792785] [2021-07-13 19:41:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:42,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:42,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:42,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:42,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,503 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:41:42,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:42,503 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-13 19:41:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108792785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:42,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374607173] [2021-07-13 19:41:42,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:42,515 INFO L87 Difference]: Start difference. First operand 332 states and 1015 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:42,655 INFO L93 Difference]: Finished difference Result 419 states and 1237 transitions. [2021-07-13 19:41:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:42,656 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:41:42,656 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:41:42,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:41:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-07-13 19:41:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0527859237536656) internal successors, (1041), 341 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1041 transitions. [2021-07-13 19:41:42,660 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1041 transitions. Word has length 20 [2021-07-13 19:41:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:42,661 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1041 transitions. [2021-07-13 19:41:42,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1041 transitions. [2021-07-13 19:41:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:42,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:42,661 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:42,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-07-13 19:41:42,862 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 233 times [2021-07-13 19:41:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:42,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111769489] [2021-07-13 19:41:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111769489] [2021-07-13 19:41:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111769489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241802518] [2021-07-13 19:41:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:42,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:43,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:43,040 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:41:43,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:43,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-13 19:41:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:43,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241802518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:43,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:43,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:41:43,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663362161] [2021-07-13 19:41:43,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:41:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:41:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:41:43,062 INFO L87 Difference]: Start difference. First operand 342 states and 1041 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:43,186 INFO L93 Difference]: Finished difference Result 471 states and 1358 transitions. [2021-07-13 19:41:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:43,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:43,187 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:41:43,187 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:41:43,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:41:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 345. [2021-07-13 19:41:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.058139534883721) internal successors, (1052), 344 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1052 transitions. [2021-07-13 19:41:43,192 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1052 transitions. Word has length 20 [2021-07-13 19:41:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:43,192 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1052 transitions. [2021-07-13 19:41:43,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1052 transitions. [2021-07-13 19:41:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:43,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:43,192 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:43,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2211 [2021-07-13 19:41:43,393 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 234 times [2021-07-13 19:41:43,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:43,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916815188] [2021-07-13 19:41:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:43,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:43,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916815188] [2021-07-13 19:41:43,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916815188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:43,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608659327] [2021-07-13 19:41:43,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:43,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:43,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:43,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:43,578 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-13 19:41:43,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:43,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-13 19:41:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608659327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:41:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534529227] [2021-07-13 19:41:43,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:41:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:41:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:41:43,600 INFO L87 Difference]: Start difference. First operand 345 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:43,732 INFO L93 Difference]: Finished difference Result 428 states and 1255 transitions. [2021-07-13 19:41:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:43,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:43,733 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:41:43,733 INFO L226 Difference]: Without dead ends: 422 [2021-07-13 19:41:43,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-07-13 19:41:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 337. [2021-07-13 19:41:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0595238095238093) internal successors, (1028), 336 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1028 transitions. [2021-07-13 19:41:43,737 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1028 transitions. Word has length 20 [2021-07-13 19:41:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:43,737 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1028 transitions. [2021-07-13 19:41:43,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1028 transitions. [2021-07-13 19:41:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:43,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:43,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:43,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:43,942 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 235 times [2021-07-13 19:41:43,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:43,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888391845] [2021-07-13 19:41:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888391845] [2021-07-13 19:41:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888391845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953513152] [2021-07-13 19:41:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953513152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:44,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:44,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183450107] [2021-07-13 19:41:44,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:44,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:44,162 INFO L87 Difference]: Start difference. First operand 337 states and 1028 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:44,304 INFO L93 Difference]: Finished difference Result 397 states and 1171 transitions. [2021-07-13 19:41:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:44,305 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:41:44,305 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:41:44,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:41:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2021-07-13 19:41:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0701754385964914) internal successors, (1050), 342 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1050 transitions. [2021-07-13 19:41:44,309 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1050 transitions. Word has length 20 [2021-07-13 19:41:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:44,309 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1050 transitions. [2021-07-13 19:41:44,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1050 transitions. [2021-07-13 19:41:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:44,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:44,310 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:44,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,510 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 236 times [2021-07-13 19:41:44,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:44,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621093417] [2021-07-13 19:41:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621093417] [2021-07-13 19:41:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621093417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739088138] [2021-07-13 19:41:44,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:44,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:44,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739088138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:44,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619246219] [2021-07-13 19:41:44,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:44,731 INFO L87 Difference]: Start difference. First operand 343 states and 1050 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:44,934 INFO L93 Difference]: Finished difference Result 403 states and 1178 transitions. [2021-07-13 19:41:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:44,935 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:41:44,935 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:41:44,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:41:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-07-13 19:41:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0648967551622417) internal successors, (1039), 339 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2021-07-13 19:41:44,939 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2021-07-13 19:41:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:44,939 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2021-07-13 19:41:44,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2021-07-13 19:41:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:44,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:44,940 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:45,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-07-13 19:41:45,140 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 237 times [2021-07-13 19:41:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:45,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512256559] [2021-07-13 19:41:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512256559] [2021-07-13 19:41:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512256559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785656185] [2021-07-13 19:41:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:45,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785656185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:45,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:41:45,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271312535] [2021-07-13 19:41:45,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:41:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:41:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:41:45,340 INFO L87 Difference]: Start difference. First operand 340 states and 1039 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:45,531 INFO L93 Difference]: Finished difference Result 361 states and 1083 transitions. [2021-07-13 19:41:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:45,532 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:41:45,532 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:41:45,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:41:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 332. [2021-07-13 19:41:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.066465256797583) internal successors, (1015), 331 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-07-13 19:41:45,535 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-07-13 19:41:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:45,536 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-07-13 19:41:45,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-07-13 19:41:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:45,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:45,536 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:45,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-13 19:41:45,745 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash -144970506, now seen corresponding path program 238 times [2021-07-13 19:41:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476092615] [2021-07-13 19:41:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476092615] [2021-07-13 19:41:45,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476092615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204904145] [2021-07-13 19:41:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:45,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:45,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:45,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:45,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:45,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:45,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:45,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,926 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-13 19:41:45,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:45,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-13 19:41:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204904145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:45,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:41:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853303668] [2021-07-13 19:41:45,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:45,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:45,982 INFO L87 Difference]: Start difference. First operand 332 states and 1015 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:46,235 INFO L93 Difference]: Finished difference Result 522 states and 1535 transitions. [2021-07-13 19:41:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:46,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:46,236 INFO L225 Difference]: With dead ends: 522 [2021-07-13 19:41:46,236 INFO L226 Difference]: Without dead ends: 470 [2021-07-13 19:41:46,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-13 19:41:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 337. [2021-07-13 19:41:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-13 19:41:46,240 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-13 19:41:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:46,240 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-13 19:41:46,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-13 19:41:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:46,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:46,241 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:46,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-07-13 19:41:46,441 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 239 times [2021-07-13 19:41:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:46,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181543339] [2021-07-13 19:41:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181543339] [2021-07-13 19:41:46,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181543339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107066781] [2021-07-13 19:41:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:46,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:46,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:46,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:46,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:46,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,670 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-07-13 19:41:46,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-07-13 19:41:46,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:46,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,695 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-13 19:41:46,695 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:41:46,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:46,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-07-13 19:41:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107066781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:46,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355738] [2021-07-13 19:41:46,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:46,735 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:46,885 INFO L93 Difference]: Finished difference Result 577 states and 1670 transitions. [2021-07-13 19:41:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:46,887 INFO L225 Difference]: With dead ends: 577 [2021-07-13 19:41:46,887 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 19:41:46,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 19:41:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 349. [2021-07-13 19:41:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-13 19:41:46,891 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-13 19:41:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:46,891 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-13 19:41:46,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-13 19:41:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:46,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:46,892 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:47,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-07-13 19:41:47,108 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 240 times [2021-07-13 19:41:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:47,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464171785] [2021-07-13 19:41:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:47,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:47,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464171785] [2021-07-13 19:41:47,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464171785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:47,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448922220] [2021-07-13 19:41:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:47,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:47,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:47,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,318 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-07-13 19:41:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:47,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:47,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,344 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:47,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:47,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-13 19:41:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:47,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448922220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:47,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:47,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:47,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337510227] [2021-07-13 19:41:47,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:47,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:47,387 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:47,540 INFO L93 Difference]: Finished difference Result 629 states and 1791 transitions. [2021-07-13 19:41:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:47,541 INFO L225 Difference]: With dead ends: 629 [2021-07-13 19:41:47,541 INFO L226 Difference]: Without dead ends: 629 [2021-07-13 19:41:47,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-13 19:41:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 355. [2021-07-13 19:41:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1242937853107344) internal successors, (1106), 354 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-07-13 19:41:47,546 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-07-13 19:41:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:47,546 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-07-13 19:41:47,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-07-13 19:41:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:47,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:47,547 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:47,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:47,747 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 241 times [2021-07-13 19:41:47,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:47,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257995163] [2021-07-13 19:41:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:47,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257995163] [2021-07-13 19:41:47,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257995163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917571894] [2021-07-13 19:41:47,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:47,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:47,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:47,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:47,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:47,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,977 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:47,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:47,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917571894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:48,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108742640] [2021-07-13 19:41:48,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:48,019 INFO L87 Difference]: Start difference. First operand 355 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:48,174 INFO L93 Difference]: Finished difference Result 586 states and 1682 transitions. [2021-07-13 19:41:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:48,175 INFO L225 Difference]: With dead ends: 586 [2021-07-13 19:41:48,175 INFO L226 Difference]: Without dead ends: 580 [2021-07-13 19:41:48,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-13 19:41:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 353. [2021-07-13 19:41:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1107954545454546) internal successors, (1095), 352 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-07-13 19:41:48,180 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-07-13 19:41:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:48,180 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-07-13 19:41:48,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-07-13 19:41:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:48,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:48,181 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:48,397 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 242 times [2021-07-13 19:41:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:48,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230569446] [2021-07-13 19:41:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230569446] [2021-07-13 19:41:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230569446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872825030] [2021-07-13 19:41:48,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:48,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:48,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:48,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:48,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:48,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:48,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,585 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-07-13 19:41:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:48,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:48,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:48,597 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:41:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872825030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:48,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:41:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139904788] [2021-07-13 19:41:48,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:48,648 INFO L87 Difference]: Start difference. First operand 353 states and 1095 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:48,869 INFO L93 Difference]: Finished difference Result 469 states and 1402 transitions. [2021-07-13 19:41:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:48,870 INFO L225 Difference]: With dead ends: 469 [2021-07-13 19:41:48,870 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:41:48,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:41:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-07-13 19:41:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0809248554913293) internal successors, (1066), 346 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2021-07-13 19:41:48,874 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2021-07-13 19:41:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:48,874 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2021-07-13 19:41:48,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2021-07-13 19:41:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:48,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:48,874 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-07-13 19:41:49,085 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 243 times [2021-07-13 19:41:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:49,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594380782] [2021-07-13 19:41:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:49,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594380782] [2021-07-13 19:41:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594380782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409910543] [2021-07-13 19:41:49,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:49,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,298 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-07-13 19:41:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:49,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:49,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,325 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:49,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:49,325 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-13 19:41:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409910543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:49,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:41:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878800197] [2021-07-13 19:41:49,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:41:49,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:41:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:49,378 INFO L87 Difference]: Start difference. First operand 347 states and 1066 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:49,556 INFO L93 Difference]: Finished difference Result 530 states and 1548 transitions. [2021-07-13 19:41:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:49,558 INFO L225 Difference]: With dead ends: 530 [2021-07-13 19:41:49,558 INFO L226 Difference]: Without dead ends: 530 [2021-07-13 19:41:49,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-13 19:41:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 337. [2021-07-13 19:41:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-13 19:41:49,562 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-13 19:41:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:49,562 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-13 19:41:49,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-13 19:41:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:49,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:49,563 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:49,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2311,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,763 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 244 times [2021-07-13 19:41:49,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:49,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703133072] [2021-07-13 19:41:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:49,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703133072] [2021-07-13 19:41:49,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703133072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815026911] [2021-07-13 19:41:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:49,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:49,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,975 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-13 19:41:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:49,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:49,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,997 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:41:49,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:49,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-13 19:41:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815026911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:50,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447129121] [2021-07-13 19:41:50,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:50,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:50,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:50,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:50,044 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:50,177 INFO L93 Difference]: Finished difference Result 497 states and 1466 transitions. [2021-07-13 19:41:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:50,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:50,178 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:41:50,178 INFO L226 Difference]: Without dead ends: 497 [2021-07-13 19:41:50,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-13 19:41:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 340. [2021-07-13 19:41:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-13 19:41:50,183 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-13 19:41:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:50,183 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-13 19:41:50,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-13 19:41:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:50,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:50,183 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-07-13 19:41:50,384 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 245 times [2021-07-13 19:41:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403090350] [2021-07-13 19:41:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403090350] [2021-07-13 19:41:50,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403090350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292013044] [2021-07-13 19:41:50,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:50,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:50,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:50,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:50,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,617 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:50,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:50,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292013044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:50,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:41:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768203597] [2021-07-13 19:41:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:41:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:41:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:41:50,665 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:50,775 INFO L93 Difference]: Finished difference Result 464 states and 1389 transitions. [2021-07-13 19:41:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:50,776 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:41:50,776 INFO L226 Difference]: Without dead ends: 464 [2021-07-13 19:41:50,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:41:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-13 19:41:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 331. [2021-07-13 19:41:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0636363636363635) internal successors, (1011), 330 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1011 transitions. [2021-07-13 19:41:50,781 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1011 transitions. Word has length 20 [2021-07-13 19:41:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:50,781 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1011 transitions. [2021-07-13 19:41:50,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1011 transitions. [2021-07-13 19:41:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:50,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:50,781 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2333 [2021-07-13 19:41:50,993 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 246 times [2021-07-13 19:41:50,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076784787] [2021-07-13 19:41:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076784787] [2021-07-13 19:41:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076784787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133530921] [2021-07-13 19:41:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:51,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:51,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:51,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:51,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:51,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:51,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,226 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:51,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:51,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133530921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:51,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350411525] [2021-07-13 19:41:51,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:51,300 INFO L87 Difference]: Start difference. First operand 331 states and 1011 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:51,518 INFO L93 Difference]: Finished difference Result 574 states and 1673 transitions. [2021-07-13 19:41:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:51,519 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:41:51,519 INFO L226 Difference]: Without dead ends: 574 [2021-07-13 19:41:51,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-13 19:41:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 339. [2021-07-13 19:41:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0976331360946747) internal successors, (1047), 338 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1047 transitions. [2021-07-13 19:41:51,524 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1047 transitions. Word has length 20 [2021-07-13 19:41:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:51,524 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1047 transitions. [2021-07-13 19:41:51,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1047 transitions. [2021-07-13 19:41:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:51,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:51,525 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:51,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-07-13 19:41:51,725 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 247 times [2021-07-13 19:41:51,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:51,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989436033] [2021-07-13 19:41:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:51,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989436033] [2021-07-13 19:41:51,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989436033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79129773] [2021-07-13 19:41:51,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:51,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:51,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,953 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-13 19:41:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:51,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:51,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,978 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:41:51,978 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:41:51,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:51,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-13 19:41:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79129773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:52,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:52,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741974753] [2021-07-13 19:41:52,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:52,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:52,052 INFO L87 Difference]: Start difference. First operand 339 states and 1047 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:52,235 INFO L93 Difference]: Finished difference Result 560 states and 1622 transitions. [2021-07-13 19:41:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:52,236 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:41:52,236 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:41:52,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:41:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-07-13 19:41:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0762463343108504) internal successors, (1049), 341 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1049 transitions. [2021-07-13 19:41:52,241 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1049 transitions. Word has length 20 [2021-07-13 19:41:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:52,241 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1049 transitions. [2021-07-13 19:41:52,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1049 transitions. [2021-07-13 19:41:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:52,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:52,242 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:52,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-07-13 19:41:52,453 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 248 times [2021-07-13 19:41:52,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:52,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551760615] [2021-07-13 19:41:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551760615] [2021-07-13 19:41:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551760615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898264476] [2021-07-13 19:41:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:52,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:52,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:52,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:52,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:52,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,756 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-13 19:41:52,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:52,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:52,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,781 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:52,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:52,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-13 19:41:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898264476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:52,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:52,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602959784] [2021-07-13 19:41:52,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:52,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:52,860 INFO L87 Difference]: Start difference. First operand 342 states and 1049 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:53,100 INFO L93 Difference]: Finished difference Result 570 states and 1656 transitions. [2021-07-13 19:41:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:53,102 INFO L225 Difference]: With dead ends: 570 [2021-07-13 19:41:53,102 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 19:41:53,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 19:41:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 335. [2021-07-13 19:41:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-07-13 19:41:53,106 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-07-13 19:41:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:53,106 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-07-13 19:41:53,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-07-13 19:41:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:53,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:53,107 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:53,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:53,325 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 249 times [2021-07-13 19:41:53,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:53,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981684962] [2021-07-13 19:41:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:53,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981684962] [2021-07-13 19:41:53,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981684962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929507514] [2021-07-13 19:41:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:53,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:53,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:53,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:53,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:53,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:53,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:53,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,553 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:53,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:53,553 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929507514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168238325] [2021-07-13 19:41:53,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:53,627 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:53,843 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-07-13 19:41:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:53,844 INFO L225 Difference]: With dead ends: 539 [2021-07-13 19:41:53,844 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 19:41:53,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 19:41:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-07-13 19:41:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.069486404833837) internal successors, (1016), 331 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1016 transitions. [2021-07-13 19:41:53,849 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1016 transitions. Word has length 20 [2021-07-13 19:41:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:53,849 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1016 transitions. [2021-07-13 19:41:53,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1016 transitions. [2021-07-13 19:41:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:53,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:53,849 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:54,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:54,050 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 250 times [2021-07-13 19:41:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:54,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955932811] [2021-07-13 19:41:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:54,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955932811] [2021-07-13 19:41:54,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955932811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141533123] [2021-07-13 19:41:54,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:54,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:54,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:54,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:54,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:54,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:54,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:54,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,278 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:54,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:54,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141533123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446418191] [2021-07-13 19:41:54,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:54,356 INFO L87 Difference]: Start difference. First operand 332 states and 1016 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:54,532 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-07-13 19:41:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:54,533 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:41:54,533 INFO L226 Difference]: Without dead ends: 499 [2021-07-13 19:41:54,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-07-13 19:41:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 342. [2021-07-13 19:41:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.058651026392962) internal successors, (1043), 341 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1043 transitions. [2021-07-13 19:41:54,537 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1043 transitions. Word has length 20 [2021-07-13 19:41:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:54,538 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1043 transitions. [2021-07-13 19:41:54,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1043 transitions. [2021-07-13 19:41:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:54,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:54,538 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:54,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-07-13 19:41:54,739 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 251 times [2021-07-13 19:41:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:54,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507581154] [2021-07-13 19:41:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507581154] [2021-07-13 19:41:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507581154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675868607] [2021-07-13 19:41:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:54,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:54,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:54,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:54,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:54,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:41:54,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:54,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,977 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:41:54,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:54,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:41:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675868607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:55,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775484658] [2021-07-13 19:41:55,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:55,051 INFO L87 Difference]: Start difference. First operand 342 states and 1043 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:55,238 INFO L93 Difference]: Finished difference Result 482 states and 1437 transitions. [2021-07-13 19:41:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:55,239 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:41:55,239 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:41:55,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:41:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 329. [2021-07-13 19:41:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.057926829268293) internal successors, (1003), 328 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1003 transitions. [2021-07-13 19:41:55,243 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1003 transitions. Word has length 20 [2021-07-13 19:41:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:55,243 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1003 transitions. [2021-07-13 19:41:55,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1003 transitions. [2021-07-13 19:41:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:55,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:55,244 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:55,444 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 252 times [2021-07-13 19:41:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:55,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507523443] [2021-07-13 19:41:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507523443] [2021-07-13 19:41:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507523443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723677426] [2021-07-13 19:41:55,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:55,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723677426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:55,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636366074] [2021-07-13 19:41:55,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:55,718 INFO L87 Difference]: Start difference. First operand 329 states and 1003 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:56,022 INFO L93 Difference]: Finished difference Result 403 states and 1191 transitions. [2021-07-13 19:41:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:56,023 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:41:56,023 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:41:56,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:41:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 336. [2021-07-13 19:41:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.074626865671642) internal successors, (1030), 335 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1030 transitions. [2021-07-13 19:41:56,027 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1030 transitions. Word has length 20 [2021-07-13 19:41:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:56,027 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1030 transitions. [2021-07-13 19:41:56,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1030 transitions. [2021-07-13 19:41:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:56,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:56,027 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:56,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-07-13 19:41:56,232 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 253 times [2021-07-13 19:41:56,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:56,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835311329] [2021-07-13 19:41:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835311329] [2021-07-13 19:41:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835311329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264233395] [2021-07-13 19:41:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264233395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:56,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:56,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66326375] [2021-07-13 19:41:56,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:56,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:56,508 INFO L87 Difference]: Start difference. First operand 336 states and 1030 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:56,801 INFO L93 Difference]: Finished difference Result 409 states and 1198 transitions. [2021-07-13 19:41:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:56,802 INFO L225 Difference]: With dead ends: 409 [2021-07-13 19:41:56,802 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:41:56,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:41:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-07-13 19:41:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.069277108433735) internal successors, (1019), 332 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1019 transitions. [2021-07-13 19:41:56,806 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1019 transitions. Word has length 20 [2021-07-13 19:41:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1019 transitions. [2021-07-13 19:41:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1019 transitions. [2021-07-13 19:41:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:56,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:56,806 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:57,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,013 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 254 times [2021-07-13 19:41:57,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:57,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760129954] [2021-07-13 19:41:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:57,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760129954] [2021-07-13 19:41:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760129954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895994919] [2021-07-13 19:41:57,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:57,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895994919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:57,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:57,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622343419] [2021-07-13 19:41:57,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:57,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:57,277 INFO L87 Difference]: Start difference. First operand 333 states and 1019 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,550 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-13 19:41:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:57,627 INFO L93 Difference]: Finished difference Result 373 states and 1116 transitions. [2021-07-13 19:41:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:57,628 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:41:57,628 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:41:57,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:41:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 330. [2021-07-13 19:41:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0638297872340425) internal successors, (1008), 329 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-07-13 19:41:57,632 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-07-13 19:41:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:57,632 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-07-13 19:41:57,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-07-13 19:41:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:57,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:57,633 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:57,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,835 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 255 times [2021-07-13 19:41:57,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:57,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207853857] [2021-07-13 19:41:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:57,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:57,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207853857] [2021-07-13 19:41:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207853857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:57,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719406515] [2021-07-13 19:41:57,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:57,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:57,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719406515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:58,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:58,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252793881] [2021-07-13 19:41:58,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:58,094 INFO L87 Difference]: Start difference. First operand 330 states and 1008 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:58,300 INFO L93 Difference]: Finished difference Result 487 states and 1401 transitions. [2021-07-13 19:41:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:58,301 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:41:58,301 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:41:58,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:41:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 338. [2021-07-13 19:41:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0979228486646884) internal successors, (1044), 337 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-07-13 19:41:58,305 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-07-13 19:41:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:58,305 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-07-13 19:41:58,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-07-13 19:41:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:58,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:58,306 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:58,517 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 256 times [2021-07-13 19:41:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:58,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243082957] [2021-07-13 19:41:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:58,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243082957] [2021-07-13 19:41:58,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243082957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570646589] [2021-07-13 19:41:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:58,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:58,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570646589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:58,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:58,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006663406] [2021-07-13 19:41:58,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:58,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:58,767 INFO L87 Difference]: Start difference. First operand 338 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:58,998 INFO L93 Difference]: Finished difference Result 493 states and 1402 transitions. [2021-07-13 19:41:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:58,999 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:41:58,999 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:41:58,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:41:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 341. [2021-07-13 19:41:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0764705882352943) internal successors, (1046), 340 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-07-13 19:41:59,003 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-07-13 19:41:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:59,004 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-07-13 19:41:59,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-07-13 19:41:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:59,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:59,004 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:59,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,205 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 257 times [2021-07-13 19:41:59,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:59,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295239344] [2021-07-13 19:41:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:59,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295239344] [2021-07-13 19:41:59,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295239344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020622558] [2021-07-13 19:41:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:59,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:41:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020622558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:59,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:41:59,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309501696] [2021-07-13 19:41:59,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:41:59,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:41:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:41:59,471 INFO L87 Difference]: Start difference. First operand 341 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:59,699 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2021-07-13 19:41:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:41:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:59,700 INFO L225 Difference]: With dead ends: 455 [2021-07-13 19:41:59,700 INFO L226 Difference]: Without dead ends: 455 [2021-07-13 19:41:59,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-13 19:41:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 334. [2021-07-13 19:41:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.0870870870870872) internal successors, (1028), 333 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1028 transitions. [2021-07-13 19:41:59,704 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1028 transitions. Word has length 20 [2021-07-13 19:41:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:59,704 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1028 transitions. [2021-07-13 19:41:59,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1028 transitions. [2021-07-13 19:41:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:59,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:59,704 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:59,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,905 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 258 times [2021-07-13 19:41:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:59,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655008791] [2021-07-13 19:41:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655008791] [2021-07-13 19:41:59,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655008791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067535295] [2021-07-13 19:41:59,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:00,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067535295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:00,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:00,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152975926] [2021-07-13 19:42:00,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:00,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:00,172 INFO L87 Difference]: Start difference. First operand 334 states and 1028 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:00,390 INFO L93 Difference]: Finished difference Result 418 states and 1240 transitions. [2021-07-13 19:42:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:00,391 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:42:00,391 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:42:00,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:42:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 331. [2021-07-13 19:42:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.06969696969697) internal successors, (1013), 330 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1013 transitions. [2021-07-13 19:42:00,395 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1013 transitions. Word has length 20 [2021-07-13 19:42:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:00,395 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1013 transitions. [2021-07-13 19:42:00,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1013 transitions. [2021-07-13 19:42:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:00,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:00,395 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:00,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-07-13 19:42:00,596 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:00,596 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 259 times [2021-07-13 19:42:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:00,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646537428] [2021-07-13 19:42:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646537428] [2021-07-13 19:42:00,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646537428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340996642] [2021-07-13 19:42:00,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340996642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237511115] [2021-07-13 19:42:00,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:00,849 INFO L87 Difference]: Start difference. First operand 331 states and 1013 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:01,074 INFO L93 Difference]: Finished difference Result 455 states and 1314 transitions. [2021-07-13 19:42:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:01,075 INFO L225 Difference]: With dead ends: 455 [2021-07-13 19:42:01,075 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:42:01,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:42:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 341. [2021-07-13 19:42:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0588235294117645) internal successors, (1040), 340 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1040 transitions. [2021-07-13 19:42:01,079 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1040 transitions. Word has length 20 [2021-07-13 19:42:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:01,079 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1040 transitions. [2021-07-13 19:42:01,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1040 transitions. [2021-07-13 19:42:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:01,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:01,080 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:01,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,280 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 260 times [2021-07-13 19:42:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:01,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661036484] [2021-07-13 19:42:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661036484] [2021-07-13 19:42:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661036484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622210060] [2021-07-13 19:42:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622210060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:01,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:01,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910317194] [2021-07-13 19:42:01,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:01,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:01,559 INFO L87 Difference]: Start difference. First operand 341 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:01,758 INFO L93 Difference]: Finished difference Result 432 states and 1275 transitions. [2021-07-13 19:42:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:01,759 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:42:01,759 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 19:42:01,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 19:42:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2021-07-13 19:42:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0638297872340425) internal successors, (1008), 329 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-07-13 19:42:01,763 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-07-13 19:42:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:01,764 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-07-13 19:42:01,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-07-13 19:42:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:01,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:01,764 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:01,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,964 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 261 times [2021-07-13 19:42:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:01,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326835587] [2021-07-13 19:42:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:02,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326835587] [2021-07-13 19:42:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326835587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889471905] [2021-07-13 19:42:02,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:02,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:02,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889471905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:02,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:02,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:02,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292431016] [2021-07-13 19:42:02,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:02,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:02,217 INFO L87 Difference]: Start difference. First operand 330 states and 1008 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:02,535 INFO L93 Difference]: Finished difference Result 364 states and 1092 transitions. [2021-07-13 19:42:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:02,536 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:42:02,536 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 19:42:02,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 19:42:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2021-07-13 19:42:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0604229607250755) internal successors, (1013), 331 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1013 transitions. [2021-07-13 19:42:02,540 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1013 transitions. Word has length 20 [2021-07-13 19:42:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:02,540 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1013 transitions. [2021-07-13 19:42:02,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1013 transitions. [2021-07-13 19:42:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:02,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:02,540 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:02,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-07-13 19:42:02,741 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 262 times [2021-07-13 19:42:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:02,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009169945] [2021-07-13 19:42:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:02,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:02,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009169945] [2021-07-13 19:42:02,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009169945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:02,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794252806] [2021-07-13 19:42:02,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:02,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:02,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794252806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:03,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158927817] [2021-07-13 19:42:03,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:03,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:03,003 INFO L87 Difference]: Start difference. First operand 332 states and 1013 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:03,312 INFO L93 Difference]: Finished difference Result 389 states and 1144 transitions. [2021-07-13 19:42:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:03,313 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:42:03,313 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:42:03,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:42:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2021-07-13 19:42:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0498533724340176) internal successors, (1040), 341 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1040 transitions. [2021-07-13 19:42:03,317 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1040 transitions. Word has length 20 [2021-07-13 19:42:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:03,317 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1040 transitions. [2021-07-13 19:42:03,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1040 transitions. [2021-07-13 19:42:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:03,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:03,318 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:03,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,518 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 263 times [2021-07-13 19:42:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:03,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009120338] [2021-07-13 19:42:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:03,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009120338] [2021-07-13 19:42:03,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009120338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401227552] [2021-07-13 19:42:03,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401227552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:03,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796748070] [2021-07-13 19:42:03,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:03,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:03,771 INFO L87 Difference]: Start difference. First operand 342 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:04,019 INFO L93 Difference]: Finished difference Result 360 states and 1090 transitions. [2021-07-13 19:42:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:04,020 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:42:04,020 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:42:04,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:42:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2021-07-13 19:42:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0521472392638036) internal successors, (995), 326 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 995 transitions. [2021-07-13 19:42:04,024 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 995 transitions. Word has length 20 [2021-07-13 19:42:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:04,024 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 995 transitions. [2021-07-13 19:42:04,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 995 transitions. [2021-07-13 19:42:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:04,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:04,024 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:04,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-07-13 19:42:04,225 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 264 times [2021-07-13 19:42:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605483316] [2021-07-13 19:42:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:04,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605483316] [2021-07-13 19:42:04,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605483316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139227295] [2021-07-13 19:42:04,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:04,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:04,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:04,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:04,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:04,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:04,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,457 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-07-13 19:42:04,457 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-07-13 19:42:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:04,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,481 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-13 19:42:04,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:04,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-07-13 19:42:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139227295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:04,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:42:04,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203426184] [2021-07-13 19:42:04,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:04,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:04,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:04,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:04,553 INFO L87 Difference]: Start difference. First operand 327 states and 995 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:04,840 INFO L93 Difference]: Finished difference Result 462 states and 1326 transitions. [2021-07-13 19:42:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:04,841 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:42:04,841 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 19:42:04,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 19:42:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 322. [2021-07-13 19:42:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.0218068535825546) internal successors, (970), 321 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 970 transitions. [2021-07-13 19:42:04,844 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 970 transitions. Word has length 20 [2021-07-13 19:42:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:04,845 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 970 transitions. [2021-07-13 19:42:04,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 970 transitions. [2021-07-13 19:42:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:04,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:04,845 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:05,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,046 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 265 times [2021-07-13 19:42:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:05,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462825093] [2021-07-13 19:42:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462825093] [2021-07-13 19:42:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462825093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699650074] [2021-07-13 19:42:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:05,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:05,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:05,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,252 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:42:05,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:05,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:05,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:05,266 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699650074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18208423] [2021-07-13 19:42:05,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:05,310 INFO L87 Difference]: Start difference. First operand 322 states and 970 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:05,472 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-07-13 19:42:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:05,474 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:42:05,474 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 19:42:05,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 19:42:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 336. [2021-07-13 19:42:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0417910447761196) internal successors, (1019), 335 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1019 transitions. [2021-07-13 19:42:05,478 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1019 transitions. Word has length 20 [2021-07-13 19:42:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:05,478 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1019 transitions. [2021-07-13 19:42:05,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1019 transitions. [2021-07-13 19:42:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:05,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:05,479 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:05,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2555 [2021-07-13 19:42:05,679 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 266 times [2021-07-13 19:42:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:05,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397508654] [2021-07-13 19:42:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:05,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397508654] [2021-07-13 19:42:05,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397508654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210193317] [2021-07-13 19:42:05,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:05,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,888 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-07-13 19:42:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:05,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,911 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-13 19:42:05,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-07-13 19:42:05,911 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:05,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:05,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210193317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664871457] [2021-07-13 19:42:05,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:05,958 INFO L87 Difference]: Start difference. First operand 336 states and 1019 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:06,198 INFO L93 Difference]: Finished difference Result 536 states and 1528 transitions. [2021-07-13 19:42:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:06,199 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:42:06,199 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:42:06,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:42:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 342. [2021-07-13 19:42:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.06158357771261) internal successors, (1044), 341 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1044 transitions. [2021-07-13 19:42:06,204 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1044 transitions. Word has length 20 [2021-07-13 19:42:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:06,204 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1044 transitions. [2021-07-13 19:42:06,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1044 transitions. [2021-07-13 19:42:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:06,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:06,204 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:06,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2564 [2021-07-13 19:42:06,405 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 267 times [2021-07-13 19:42:06,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:06,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421080735] [2021-07-13 19:42:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:06,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421080735] [2021-07-13 19:42:06,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421080735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124223519] [2021-07-13 19:42:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:06,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:06,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,608 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-13 19:42:06,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-07-13 19:42:06,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-07-13 19:42:06,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:06,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:06,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,632 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:06,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:06,632 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124223519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:06,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:06,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551132680] [2021-07-13 19:42:06,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:06,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:06,678 INFO L87 Difference]: Start difference. First operand 342 states and 1044 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:06,852 INFO L93 Difference]: Finished difference Result 493 states and 1419 transitions. [2021-07-13 19:42:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:06,853 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:42:06,853 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:42:06,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:42:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 340. [2021-07-13 19:42:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0471976401179943) internal successors, (1033), 339 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1033 transitions. [2021-07-13 19:42:06,858 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1033 transitions. Word has length 20 [2021-07-13 19:42:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:06,858 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1033 transitions. [2021-07-13 19:42:06,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1033 transitions. [2021-07-13 19:42:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:06,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:06,859 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:07,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:07,059 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 268 times [2021-07-13 19:42:07,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:07,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095409701] [2021-07-13 19:42:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095409701] [2021-07-13 19:42:07,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095409701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552308997] [2021-07-13 19:42:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:07,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:07,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:07,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:07,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,268 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.3 percent of original size [2021-07-13 19:42:07,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:07,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,292 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-13 19:42:07,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:07,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-07-13 19:42:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552308997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:07,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:42:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465148973] [2021-07-13 19:42:07,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:07,351 INFO L87 Difference]: Start difference. First operand 340 states and 1033 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:07,709 INFO L93 Difference]: Finished difference Result 438 states and 1286 transitions. [2021-07-13 19:42:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:07,710 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:42:07,710 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:42:07,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:42:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 331. [2021-07-13 19:42:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0242424242424244) internal successors, (998), 330 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-07-13 19:42:07,714 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-07-13 19:42:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:07,714 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-07-13 19:42:07,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-07-13 19:42:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:07,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:07,715 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:07,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-07-13 19:42:07,915 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 269 times [2021-07-13 19:42:07,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:07,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198187013] [2021-07-13 19:42:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:07,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198187013] [2021-07-13 19:42:07,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198187013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013609007] [2021-07-13 19:42:07,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:08,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:08,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,133 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-13 19:42:08,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-07-13 19:42:08,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:08,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:08,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,158 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:08,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:08,158 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:08,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013609007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:08,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:08,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:42:08,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779015046] [2021-07-13 19:42:08,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:42:08,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:08,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:42:08,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:08,210 INFO L87 Difference]: Start difference. First operand 331 states and 998 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:08,411 INFO L93 Difference]: Finished difference Result 586 states and 1687 transitions. [2021-07-13 19:42:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:08,412 INFO L225 Difference]: With dead ends: 586 [2021-07-13 19:42:08,412 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:42:08,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:42:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 337. [2021-07-13 19:42:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0416666666666665) internal successors, (1022), 336 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1022 transitions. [2021-07-13 19:42:08,416 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1022 transitions. Word has length 20 [2021-07-13 19:42:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:08,417 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1022 transitions. [2021-07-13 19:42:08,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1022 transitions. [2021-07-13 19:42:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:08,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:08,417 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:08,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2599,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:08,618 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:08,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 270 times [2021-07-13 19:42:08,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:08,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562467202] [2021-07-13 19:42:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:08,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:08,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562467202] [2021-07-13 19:42:08,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562467202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:08,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311176678] [2021-07-13 19:42:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:08,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:08,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:08,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:08,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:08,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:08,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,848 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:08,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:08,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,871 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:08,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:08,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:08,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311176678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:08,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:08,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:08,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426806360] [2021-07-13 19:42:08,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:08,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:08,919 INFO L87 Difference]: Start difference. First operand 337 states and 1022 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:09,079 INFO L93 Difference]: Finished difference Result 553 states and 1605 transitions. [2021-07-13 19:42:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:09,080 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:42:09,080 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:42:09,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:42:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 340. [2021-07-13 19:42:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0589970501474926) internal successors, (1037), 339 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1037 transitions. [2021-07-13 19:42:09,085 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1037 transitions. Word has length 20 [2021-07-13 19:42:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:09,085 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1037 transitions. [2021-07-13 19:42:09,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1037 transitions. [2021-07-13 19:42:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:09,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:09,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:09,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:09,286 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 271 times [2021-07-13 19:42:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:09,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981040910] [2021-07-13 19:42:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:09,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981040910] [2021-07-13 19:42:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981040910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419279527] [2021-07-13 19:42:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:09,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:09,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:09,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,485 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:42:09,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:09,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:09,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:09,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:09,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419279527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344236835] [2021-07-13 19:42:09,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:09,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:09,549 INFO L87 Difference]: Start difference. First operand 340 states and 1037 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:09,702 INFO L93 Difference]: Finished difference Result 520 states and 1528 transitions. [2021-07-13 19:42:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:09,703 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:42:09,703 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:42:09,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:42:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 331. [2021-07-13 19:42:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0242424242424244) internal successors, (998), 330 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-07-13 19:42:09,708 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-07-13 19:42:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:09,708 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-07-13 19:42:09,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-07-13 19:42:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:09,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:09,708 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:09,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2620,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:09,909 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 272 times [2021-07-13 19:42:09,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:09,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019449158] [2021-07-13 19:42:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:09,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019449158] [2021-07-13 19:42:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019449158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590958765] [2021-07-13 19:42:09,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:10,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:10,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,122 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-13 19:42:10,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-07-13 19:42:10,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:10,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:10,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,146 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:10,146 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:10,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:10,147 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590958765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:10,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:10,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726625626] [2021-07-13 19:42:10,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:10,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:10,224 INFO L87 Difference]: Start difference. First operand 331 states and 998 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:10,519 INFO L93 Difference]: Finished difference Result 651 states and 1812 transitions. [2021-07-13 19:42:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:10,523 INFO L225 Difference]: With dead ends: 651 [2021-07-13 19:42:10,523 INFO L226 Difference]: Without dead ends: 651 [2021-07-13 19:42:10,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-07-13 19:42:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 339. [2021-07-13 19:42:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.059171597633136) internal successors, (1034), 338 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1034 transitions. [2021-07-13 19:42:10,528 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1034 transitions. Word has length 20 [2021-07-13 19:42:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:10,528 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1034 transitions. [2021-07-13 19:42:10,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1034 transitions. [2021-07-13 19:42:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:10,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:10,529 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:10,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,729 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 273 times [2021-07-13 19:42:10,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:10,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571186997] [2021-07-13 19:42:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571186997] [2021-07-13 19:42:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571186997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68431219] [2021-07-13 19:42:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:10,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,938 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-13 19:42:10,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:10,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:10,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:10,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:10,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,983 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-13 19:42:10,983 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:10,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:10,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-13 19:42:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68431219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:11,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:11,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46706874] [2021-07-13 19:42:11,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:11,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:11,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:11,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:11,058 INFO L87 Difference]: Start difference. First operand 339 states and 1034 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:11,262 INFO L93 Difference]: Finished difference Result 585 states and 1658 transitions. [2021-07-13 19:42:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:11,263 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:42:11,263 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:42:11,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:42:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-07-13 19:42:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.039156626506024) internal successors, (1009), 332 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-07-13 19:42:11,268 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-07-13 19:42:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:11,268 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-07-13 19:42:11,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-07-13 19:42:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:11,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:11,268 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:11,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-07-13 19:42:11,469 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 274 times [2021-07-13 19:42:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:11,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734276782] [2021-07-13 19:42:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:11,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734276782] [2021-07-13 19:42:11,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734276782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135064536] [2021-07-13 19:42:11,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:11,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:11,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:11,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:11,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,695 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-13 19:42:11,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:11,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:11,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,724 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-07-13 19:42:11,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:11,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:11,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:11,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-07-13 19:42:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135064536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609265741] [2021-07-13 19:42:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:11,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:11,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:11,817 INFO L87 Difference]: Start difference. First operand 333 states and 1009 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:12,050 INFO L93 Difference]: Finished difference Result 610 states and 1747 transitions. [2021-07-13 19:42:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:12,051 INFO L225 Difference]: With dead ends: 610 [2021-07-13 19:42:12,051 INFO L226 Difference]: Without dead ends: 610 [2021-07-13 19:42:12,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-13 19:42:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 336. [2021-07-13 19:42:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.056716417910448) internal successors, (1024), 335 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-07-13 19:42:12,056 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-07-13 19:42:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:12,056 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-07-13 19:42:12,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-07-13 19:42:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:12,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:12,056 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-07-13 19:42:12,257 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 275 times [2021-07-13 19:42:12,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:12,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512674780] [2021-07-13 19:42:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:12,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512674780] [2021-07-13 19:42:12,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512674780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243072508] [2021-07-13 19:42:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:12,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:12,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,475 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-07-13 19:42:12,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:12,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,499 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-13 19:42:12,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-07-13 19:42:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:12,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:12,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:12,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-13 19:42:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243072508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:12,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:12,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:12,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802726749] [2021-07-13 19:42:12,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:12,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:12,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:12,593 INFO L87 Difference]: Start difference. First operand 336 states and 1024 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:12,821 INFO L93 Difference]: Finished difference Result 579 states and 1680 transitions. [2021-07-13 19:42:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:12,822 INFO L225 Difference]: With dead ends: 579 [2021-07-13 19:42:12,822 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:42:12,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:42:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-07-13 19:42:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.039156626506024) internal successors, (1009), 332 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-07-13 19:42:12,827 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-07-13 19:42:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-07-13 19:42:12,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-07-13 19:42:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:12,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:12,827 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:13,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2663 [2021-07-13 19:42:13,028 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 276 times [2021-07-13 19:42:13,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:13,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465940371] [2021-07-13 19:42:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465940371] [2021-07-13 19:42:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465940371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420364565] [2021-07-13 19:42:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:13,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:13,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:13,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,267 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:13,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:13,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,293 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:13,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:13,294 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420364565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:13,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:13,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:13,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569490169] [2021-07-13 19:42:13,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:13,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:13,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:13,372 INFO L87 Difference]: Start difference. First operand 333 states and 1009 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:13,570 INFO L93 Difference]: Finished difference Result 533 states and 1527 transitions. [2021-07-13 19:42:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:13,571 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:42:13,572 INFO L226 Difference]: Without dead ends: 527 [2021-07-13 19:42:13,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-13 19:42:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 337. [2021-07-13 19:42:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.044642857142857) internal successors, (1023), 336 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1023 transitions. [2021-07-13 19:42:13,580 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1023 transitions. Word has length 20 [2021-07-13 19:42:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:13,580 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1023 transitions. [2021-07-13 19:42:13,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1023 transitions. [2021-07-13 19:42:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:13,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:13,580 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:13,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-07-13 19:42:13,781 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 277 times [2021-07-13 19:42:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101827573] [2021-07-13 19:42:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101827573] [2021-07-13 19:42:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101827573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717793929] [2021-07-13 19:42:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:13,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,032 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-13 19:42:14,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:14,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:14,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:14,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,079 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-13 19:42:14,079 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:14,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:14,079 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-13 19:42:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:14,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717793929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:14,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:14,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:14,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641486072] [2021-07-13 19:42:14,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:14,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:14,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:14,152 INFO L87 Difference]: Start difference. First operand 337 states and 1023 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:14,378 INFO L93 Difference]: Finished difference Result 539 states and 1548 transitions. [2021-07-13 19:42:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:14,379 INFO L225 Difference]: With dead ends: 539 [2021-07-13 19:42:14,379 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 19:42:14,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 19:42:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-07-13 19:42:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0362537764350455) internal successors, (1005), 331 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-07-13 19:42:14,383 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-07-13 19:42:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:14,383 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-07-13 19:42:14,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-07-13 19:42:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:14,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:14,384 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:14,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-07-13 19:42:14,584 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 278 times [2021-07-13 19:42:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:14,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603899989] [2021-07-13 19:42:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:14,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603899989] [2021-07-13 19:42:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603899989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315064217] [2021-07-13 19:42:14,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:14,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:14,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:14,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:14,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,795 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:14,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:14,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315064217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:42:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342248330] [2021-07-13 19:42:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:42:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:42:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:14,831 INFO L87 Difference]: Start difference. First operand 332 states and 1005 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:14,979 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-07-13 19:42:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:14,980 INFO L225 Difference]: With dead ends: 469 [2021-07-13 19:42:14,980 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:42:14,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:42:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-07-13 19:42:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0269461077844313) internal successors, (1011), 334 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-07-13 19:42:14,985 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-07-13 19:42:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:14,985 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-07-13 19:42:14,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-07-13 19:42:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:14,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:14,985 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:15,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:15,186 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:15,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 279 times [2021-07-13 19:42:15,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:15,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508574943] [2021-07-13 19:42:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508574943] [2021-07-13 19:42:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508574943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194711456] [2021-07-13 19:42:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:15,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:15,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:15,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:15,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:15,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:15,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,390 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:15,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:15,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194711456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:15,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:15,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937652755] [2021-07-13 19:42:15,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:15,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:15,445 INFO L87 Difference]: Start difference. First operand 335 states and 1011 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:15,622 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-07-13 19:42:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:15,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:15,623 INFO L225 Difference]: With dead ends: 473 [2021-07-13 19:42:15,623 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:42:15,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:42:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-07-13 19:42:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-07-13 19:42:15,627 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-07-13 19:42:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:15,628 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-07-13 19:42:15,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-07-13 19:42:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:15,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:15,628 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:15,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-07-13 19:42:15,828 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 280 times [2021-07-13 19:42:15,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:15,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571569815] [2021-07-13 19:42:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571569815] [2021-07-13 19:42:15,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571569815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733474444] [2021-07-13 19:42:15,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:15,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:15,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:16,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:16,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,023 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:16,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:16,023 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733474444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:16,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:16,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993914909] [2021-07-13 19:42:16,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:16,075 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:16,231 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-07-13 19:42:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:16,232 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:42:16,232 INFO L226 Difference]: Without dead ends: 430 [2021-07-13 19:42:16,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-13 19:42:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-07-13 19:42:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-07-13 19:42:16,236 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-07-13 19:42:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:16,236 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-07-13 19:42:16,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-07-13 19:42:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:16,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:16,236 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-07-13 19:42:16,437 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 281 times [2021-07-13 19:42:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975670968] [2021-07-13 19:42:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:16,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:16,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975670968] [2021-07-13 19:42:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975670968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:16,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869809240] [2021-07-13 19:42:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:16,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:16,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869809240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:16,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:16,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621588544] [2021-07-13 19:42:16,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:16,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:16,654 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:16,791 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-07-13 19:42:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:16,791 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:42:16,792 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:42:16,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:42:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-07-13 19:42:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-13 19:42:16,795 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-13 19:42:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:16,795 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-13 19:42:16,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-13 19:42:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:16,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:16,796 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:16,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:16,996 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 282 times [2021-07-13 19:42:16,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:16,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969246401] [2021-07-13 19:42:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969246401] [2021-07-13 19:42:17,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969246401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938897737] [2021-07-13 19:42:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:17,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:17,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:17,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:17,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938897737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:17,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:17,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842870347] [2021-07-13 19:42:17,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:17,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:17,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:17,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:17,222 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:17,412 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-07-13 19:42:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:17,413 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:42:17,413 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:42:17,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:42:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-07-13 19:42:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0) internal successors, (957), 319 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-07-13 19:42:17,417 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-07-13 19:42:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:17,417 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-07-13 19:42:17,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-07-13 19:42:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:17,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:17,417 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:17,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:17,618 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 283 times [2021-07-13 19:42:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:17,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533907796] [2021-07-13 19:42:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:17,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533907796] [2021-07-13 19:42:17,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533907796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632892451] [2021-07-13 19:42:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:17,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632892451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:17,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:17,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071064353] [2021-07-13 19:42:17,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:17,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:17,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:17,837 INFO L87 Difference]: Start difference. First operand 320 states and 957 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:17,971 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-07-13 19:42:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:17,972 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:42:17,972 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:42:17,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:42:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-07-13 19:42:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.990322580645161) internal successors, (927), 310 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-07-13 19:42:17,975 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-07-13 19:42:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:17,975 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-07-13 19:42:17,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-07-13 19:42:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:17,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:17,976 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:18,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-07-13 19:42:18,176 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 284 times [2021-07-13 19:42:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:18,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574369049] [2021-07-13 19:42:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:18,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:18,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574369049] [2021-07-13 19:42:18,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574369049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:18,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762497929] [2021-07-13 19:42:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:18,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:18,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762497929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:18,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:18,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:18,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449753514] [2021-07-13 19:42:18,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:18,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:18,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:18,451 INFO L87 Difference]: Start difference. First operand 311 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:18,691 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-07-13 19:42:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:18,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:18,692 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:42:18,692 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:42:18,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:42:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-07-13 19:42:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0375) internal successors, (972), 320 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-07-13 19:42:18,697 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-07-13 19:42:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:18,697 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-07-13 19:42:18,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,697 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-07-13 19:42:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:18,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:18,697 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:18,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:18,904 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 285 times [2021-07-13 19:42:18,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:18,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652222701] [2021-07-13 19:42:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:18,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652222701] [2021-07-13 19:42:18,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652222701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221272401] [2021-07-13 19:42:18,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:19,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221272401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:19,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732223943] [2021-07-13 19:42:19,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:19,157 INFO L87 Difference]: Start difference. First operand 321 states and 972 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:19,338 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-07-13 19:42:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:19,339 INFO L225 Difference]: With dead ends: 455 [2021-07-13 19:42:19,339 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:42:19,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:42:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-07-13 19:42:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-07-13 19:42:19,344 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-07-13 19:42:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:19,344 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-07-13 19:42:19,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-07-13 19:42:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:19,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:19,344 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:19,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:19,545 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 286 times [2021-07-13 19:42:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:19,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782223490] [2021-07-13 19:42:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:19,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782223490] [2021-07-13 19:42:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782223490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378237831] [2021-07-13 19:42:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:19,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:19,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378237831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:19,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:19,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863618136] [2021-07-13 19:42:19,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:19,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:19,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:19,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:19,784 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:19,946 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-07-13 19:42:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:19,947 INFO L225 Difference]: With dead ends: 526 [2021-07-13 19:42:19,947 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 19:42:19,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 19:42:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-07-13 19:42:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0337423312883436) internal successors, (989), 326 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-07-13 19:42:19,952 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-07-13 19:42:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:19,952 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-07-13 19:42:19,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-07-13 19:42:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:19,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:19,952 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:20,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2742,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:20,153 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 287 times [2021-07-13 19:42:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206420709] [2021-07-13 19:42:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:20,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:20,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206420709] [2021-07-13 19:42:20,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206420709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:20,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746537222] [2021-07-13 19:42:20,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:20,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:20,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746537222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:20,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:20,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:20,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69772901] [2021-07-13 19:42:20,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:20,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:20,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:20,423 INFO L87 Difference]: Start difference. First operand 327 states and 989 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:20,609 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-07-13 19:42:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:20,610 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:42:20,610 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 19:42:20,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 19:42:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-07-13 19:42:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-07-13 19:42:20,615 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-07-13 19:42:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:20,616 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-07-13 19:42:20,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-07-13 19:42:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:20,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:20,616 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:20,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-07-13 19:42:20,817 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 288 times [2021-07-13 19:42:20,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:20,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387625190] [2021-07-13 19:42:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:20,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387625190] [2021-07-13 19:42:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387625190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228193726] [2021-07-13 19:42:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:20,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:20,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228193726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:21,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:21,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950629925] [2021-07-13 19:42:21,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:21,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:21,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:21,071 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:21,240 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-07-13 19:42:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:21,241 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:42:21,241 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:42:21,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:42:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-07-13 19:42:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.021406727828746) internal successors, (988), 327 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-07-13 19:42:21,246 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-07-13 19:42:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:21,246 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-07-13 19:42:21,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-07-13 19:42:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:21,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:21,246 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:21,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:21,447 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 289 times [2021-07-13 19:42:21,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:21,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663293158] [2021-07-13 19:42:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:21,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:21,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663293158] [2021-07-13 19:42:21,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663293158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541101448] [2021-07-13 19:42:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541101448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:21,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:21,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858022912] [2021-07-13 19:42:21,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:21,688 INFO L87 Difference]: Start difference. First operand 328 states and 988 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:21,954 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-07-13 19:42:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:21,955 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:42:21,956 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:42:21,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:42:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-07-13 19:42:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-07-13 19:42:21,961 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-07-13 19:42:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:21,961 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-07-13 19:42:21,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-07-13 19:42:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:21,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:21,962 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:22,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-07-13 19:42:22,162 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:22,163 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 290 times [2021-07-13 19:42:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:22,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668669888] [2021-07-13 19:42:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:22,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:22,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668669888] [2021-07-13 19:42:22,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668669888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:22,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652115144] [2021-07-13 19:42:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:22,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:22,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:22,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652115144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:22,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:22,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:22,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182609118] [2021-07-13 19:42:22,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:22,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:22,415 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:22,631 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-07-13 19:42:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:22,632 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:42:22,632 INFO L226 Difference]: Without dead ends: 431 [2021-07-13 19:42:22,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-13 19:42:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-07-13 19:42:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0153846153846153) internal successors, (980), 325 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-07-13 19:42:22,636 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-07-13 19:42:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:22,636 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-07-13 19:42:22,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-07-13 19:42:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:22,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:22,637 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:22,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2774,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:22,837 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 291 times [2021-07-13 19:42:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:22,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955251005] [2021-07-13 19:42:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:22,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:22,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955251005] [2021-07-13 19:42:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955251005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:22,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918610249] [2021-07-13 19:42:22,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:23,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918610249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:23,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432971759] [2021-07-13 19:42:23,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:23,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:23,118 INFO L87 Difference]: Start difference. First operand 326 states and 980 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:23,336 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-07-13 19:42:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:23,337 INFO L225 Difference]: With dead ends: 425 [2021-07-13 19:42:23,337 INFO L226 Difference]: Without dead ends: 425 [2021-07-13 19:42:23,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-13 19:42:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-07-13 19:42:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0031847133757963) internal successors, (943), 314 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-07-13 19:42:23,341 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-07-13 19:42:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:23,341 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-07-13 19:42:23,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-07-13 19:42:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:23,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:23,342 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:23,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:23,542 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 292 times [2021-07-13 19:42:23,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:23,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127852195] [2021-07-13 19:42:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:23,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127852195] [2021-07-13 19:42:23,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127852195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350115665] [2021-07-13 19:42:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:23,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350115665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:23,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:23,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732552633] [2021-07-13 19:42:23,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:23,834 INFO L87 Difference]: Start difference. First operand 315 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:24,039 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-07-13 19:42:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:24,040 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:42:24,040 INFO L226 Difference]: Without dead ends: 386 [2021-07-13 19:42:24,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-13 19:42:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-07-13 19:42:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-07-13 19:42:24,043 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-07-13 19:42:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:24,043 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-07-13 19:42:24,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-07-13 19:42:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:24,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:24,044 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:24,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:24,244 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 293 times [2021-07-13 19:42:24,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:24,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85152771] [2021-07-13 19:42:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:24,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:24,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85152771] [2021-07-13 19:42:24,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85152771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110554025] [2021-07-13 19:42:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:24,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:24,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110554025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:24,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:24,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354220960] [2021-07-13 19:42:24,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:24,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:24,486 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:24,698 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-07-13 19:42:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:24,699 INFO L225 Difference]: With dead ends: 393 [2021-07-13 19:42:24,699 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:42:24,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:42:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-07-13 19:42:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-07-13 19:42:24,703 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-07-13 19:42:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:24,703 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-07-13 19:42:24,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-07-13 19:42:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:24,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:24,704 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:24,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:24,905 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 294 times [2021-07-13 19:42:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:24,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774921855] [2021-07-13 19:42:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:24,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:24,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774921855] [2021-07-13 19:42:24,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774921855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:24,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671303635] [2021-07-13 19:42:24,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:25,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671303635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:25,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:25,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:25,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355834986] [2021-07-13 19:42:25,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:25,151 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:25,374 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-07-13 19:42:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:25,375 INFO L225 Difference]: With dead ends: 399 [2021-07-13 19:42:25,375 INFO L226 Difference]: Without dead ends: 399 [2021-07-13 19:42:25,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-13 19:42:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-07-13 19:42:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9876160990712073) internal successors, (965), 323 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-07-13 19:42:25,379 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-07-13 19:42:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:25,379 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-07-13 19:42:25,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-07-13 19:42:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:25,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:25,380 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:25,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-07-13 19:42:25,580 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 295 times [2021-07-13 19:42:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:25,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278775028] [2021-07-13 19:42:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:25,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:25,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278775028] [2021-07-13 19:42:25,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278775028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:25,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37154312] [2021-07-13 19:42:25,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:25,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37154312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:25,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:25,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:25,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834892501] [2021-07-13 19:42:25,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:25,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:25,818 INFO L87 Difference]: Start difference. First operand 324 states and 965 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:26,036 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-07-13 19:42:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:26,037 INFO L225 Difference]: With dead ends: 368 [2021-07-13 19:42:26,037 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:42:26,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:42:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-07-13 19:42:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.99025974025974) internal successors, (921), 308 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-07-13 19:42:26,046 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-07-13 19:42:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:26,046 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-07-13 19:42:26,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-07-13 19:42:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:26,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:26,047 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:26,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:26,247 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 296 times [2021-07-13 19:42:26,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:26,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681617817] [2021-07-13 19:42:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681617817] [2021-07-13 19:42:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681617817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659240837] [2021-07-13 19:42:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:26,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:26,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:26,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659240837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:26,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:26,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:26,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703057499] [2021-07-13 19:42:26,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:26,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:26,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:26,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:26,548 INFO L87 Difference]: Start difference. First operand 309 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:26,812 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-07-13 19:42:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:26,812 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:42:26,812 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:42:26,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:42:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-07-13 19:42:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0126582278481013) internal successors, (952), 316 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-07-13 19:42:26,816 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-07-13 19:42:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:26,816 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-07-13 19:42:26,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-07-13 19:42:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:26,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:26,817 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:27,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,033 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 297 times [2021-07-13 19:42:27,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:27,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672278201] [2021-07-13 19:42:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:27,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:27,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672278201] [2021-07-13 19:42:27,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672278201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111310455] [2021-07-13 19:42:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:27,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111310455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:27,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:27,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284951931] [2021-07-13 19:42:27,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:27,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:27,343 INFO L87 Difference]: Start difference. First operand 317 states and 952 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:27,628 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-07-13 19:42:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:27,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:27,629 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:42:27,629 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:42:27,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:42:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-07-13 19:42:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-07-13 19:42:27,633 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-07-13 19:42:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:27,633 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-07-13 19:42:27,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-07-13 19:42:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:27,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:27,634 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:27,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2821 [2021-07-13 19:42:27,834 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 298 times [2021-07-13 19:42:27,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:27,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699326495] [2021-07-13 19:42:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699326495] [2021-07-13 19:42:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699326495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916943059] [2021-07-13 19:42:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:27,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:27,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:28,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916943059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:28,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:28,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538847220] [2021-07-13 19:42:28,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:28,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:28,172 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:28,537 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-07-13 19:42:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:28,538 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:42:28,538 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:42:28,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:42:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-07-13 19:42:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-13 19:42:28,542 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-13 19:42:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:28,542 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-13 19:42:28,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-13 19:42:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:28,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:28,542 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:28,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2833,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:28,743 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 299 times [2021-07-13 19:42:28,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:28,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843056202] [2021-07-13 19:42:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:28,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843056202] [2021-07-13 19:42:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843056202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167749278] [2021-07-13 19:42:28,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:28,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:28,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:29,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167749278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:29,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:29,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:29,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359422650] [2021-07-13 19:42:29,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:29,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:29,079 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:29,327 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-07-13 19:42:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:29,328 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:42:29,329 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:42:29,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:42:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-07-13 19:42:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0377358490566038) internal successors, (966), 318 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-07-13 19:42:29,334 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-07-13 19:42:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:29,334 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-07-13 19:42:29,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-07-13 19:42:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:29,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:29,335 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:29,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-13 19:42:29,536 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 300 times [2021-07-13 19:42:29,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:29,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287889197] [2021-07-13 19:42:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:29,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287889197] [2021-07-13 19:42:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287889197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634953752] [2021-07-13 19:42:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:29,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:29,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:29,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634953752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:29,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:29,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:29,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470180066] [2021-07-13 19:42:29,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:29,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:29,881 INFO L87 Difference]: Start difference. First operand 319 states and 966 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:30,118 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-07-13 19:42:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:30,119 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:42:30,119 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:42:30,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:42:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-07-13 19:42:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.015576323987539) internal successors, (968), 321 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-07-13 19:42:30,123 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-07-13 19:42:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:30,123 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-07-13 19:42:30,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-07-13 19:42:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:30,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:30,124 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:30,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:30,324 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 301 times [2021-07-13 19:42:30,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:30,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131577635] [2021-07-13 19:42:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:30,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131577635] [2021-07-13 19:42:30,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131577635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037702278] [2021-07-13 19:42:30,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037702278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:30,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:30,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553949174] [2021-07-13 19:42:30,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:30,648 INFO L87 Difference]: Start difference. First operand 322 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:30,880 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-07-13 19:42:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:30,881 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:42:30,881 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:42:30,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:42:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-07-13 19:42:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0254777070063694) internal successors, (950), 314 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-07-13 19:42:30,885 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-07-13 19:42:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:30,885 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-07-13 19:42:30,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-07-13 19:42:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:30,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:30,886 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:31,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-07-13 19:42:31,086 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 302 times [2021-07-13 19:42:31,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:31,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442562160] [2021-07-13 19:42:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:31,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442562160] [2021-07-13 19:42:31,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442562160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784686761] [2021-07-13 19:42:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784686761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:31,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:31,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:31,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16613063] [2021-07-13 19:42:31,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:31,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:31,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:31,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:31,387 INFO L87 Difference]: Start difference. First operand 315 states and 950 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:31,659 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-07-13 19:42:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:31,660 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:42:31,660 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:42:31,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:42:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-07-13 19:42:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-07-13 19:42:31,663 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-07-13 19:42:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:31,664 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-07-13 19:42:31,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-07-13 19:42:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:31,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:31,664 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:31,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2885 [2021-07-13 19:42:31,865 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 303 times [2021-07-13 19:42:31,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:31,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924902360] [2021-07-13 19:42:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:31,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924902360] [2021-07-13 19:42:31,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924902360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694771018] [2021-07-13 19:42:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694771018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:32,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:32,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610741037] [2021-07-13 19:42:32,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:32,173 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:32,392 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-07-13 19:42:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:32,393 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:42:32,393 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:42:32,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:42:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-07-13 19:42:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9968847352024923) internal successors, (962), 321 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-07-13 19:42:32,397 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-07-13 19:42:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:32,397 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-07-13 19:42:32,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-07-13 19:42:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:32,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:32,398 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:32,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-07-13 19:42:32,598 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 304 times [2021-07-13 19:42:32,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:32,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008754365] [2021-07-13 19:42:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:32,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:32,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008754365] [2021-07-13 19:42:32,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008754365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:32,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687489459] [2021-07-13 19:42:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:32,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:32,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687489459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65547262] [2021-07-13 19:42:32,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:32,859 INFO L87 Difference]: Start difference. First operand 322 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:33,084 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-07-13 19:42:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:33,085 INFO L225 Difference]: With dead ends: 401 [2021-07-13 19:42:33,085 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:42:33,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:42:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-07-13 19:42:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-13 19:42:33,089 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-13 19:42:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:33,089 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-13 19:42:33,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-13 19:42:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:33,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:33,090 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:33,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2904,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:33,290 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 305 times [2021-07-13 19:42:33,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:33,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075862318] [2021-07-13 19:42:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075862318] [2021-07-13 19:42:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075862318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230893002] [2021-07-13 19:42:33,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:33,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:33,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230893002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:33,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:33,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:33,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686202865] [2021-07-13 19:42:33,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:33,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:33,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:33,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:33,566 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:33,842 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-07-13 19:42:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:33,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:33,843 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:42:33,843 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:42:33,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:42:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-07-13 19:42:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-07-13 19:42:33,846 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-07-13 19:42:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:33,846 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-07-13 19:42:33,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-07-13 19:42:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:33,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:33,847 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:34,047 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 306 times [2021-07-13 19:42:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:34,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310562307] [2021-07-13 19:42:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:34,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310562307] [2021-07-13 19:42:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310562307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798124452] [2021-07-13 19:42:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:34,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:34,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798124452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:34,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:34,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:34,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922698369] [2021-07-13 19:42:34,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:34,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:34,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:34,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:34,312 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:34,610 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-07-13 19:42:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:34,611 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:42:34,611 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:42:34,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:42:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-07-13 19:42:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-07-13 19:42:34,618 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-07-13 19:42:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:34,618 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-07-13 19:42:34,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-07-13 19:42:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:34,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:34,619 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:34,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2922 [2021-07-13 19:42:34,819 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 307 times [2021-07-13 19:42:34,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:34,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105619542] [2021-07-13 19:42:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:34,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105619542] [2021-07-13 19:42:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105619542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931801922] [2021-07-13 19:42:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931801922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:35,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:35,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346860384] [2021-07-13 19:42:35,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:35,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:35,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:35,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:35,107 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:35,342 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-07-13 19:42:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:35,343 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:42:35,343 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:42:35,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:42:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-07-13 19:42:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-07-13 19:42:35,346 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-07-13 19:42:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-07-13 19:42:35,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-07-13 19:42:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:35,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:35,347 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:35,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:35,547 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 308 times [2021-07-13 19:42:35,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:35,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489923267] [2021-07-13 19:42:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:35,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489923267] [2021-07-13 19:42:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489923267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494273854] [2021-07-13 19:42:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:35,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494273854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:35,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:35,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252494623] [2021-07-13 19:42:35,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:35,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:35,794 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:35,962 INFO L93 Difference]: Finished difference Result 414 states and 1199 transitions. [2021-07-13 19:42:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:35,963 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:42:35,963 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:42:35,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:42:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 320. [2021-07-13 19:42:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.040752351097179) internal successors, (970), 319 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-07-13 19:42:35,967 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-07-13 19:42:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-07-13 19:42:35,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-07-13 19:42:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:35,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:35,968 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:36,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,169 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 309 times [2021-07-13 19:42:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:36,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276831741] [2021-07-13 19:42:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:36,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:36,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276831741] [2021-07-13 19:42:36,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276831741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:36,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694746922] [2021-07-13 19:42:36,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:36,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694746922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:36,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:36,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:36,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474636874] [2021-07-13 19:42:36,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:36,432 INFO L87 Difference]: Start difference. First operand 320 states and 970 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:36,595 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-07-13 19:42:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:36,596 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:42:36,596 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:42:36,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:42:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-07-13 19:42:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-13 19:42:36,600 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-13 19:42:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:36,600 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-13 19:42:36,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-13 19:42:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:36,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:36,600 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-07-13 19:42:36,801 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 310 times [2021-07-13 19:42:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194556274] [2021-07-13 19:42:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:36,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:36,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194556274] [2021-07-13 19:42:36,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194556274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:36,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709017267] [2021-07-13 19:42:36,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709017267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:37,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:37,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922834291] [2021-07-13 19:42:37,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:37,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:37,068 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:37,321 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-07-13 19:42:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:37,322 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:42:37,322 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:42:37,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:42:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-07-13 19:42:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.036923076923077) internal successors, (987), 325 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-07-13 19:42:37,326 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-07-13 19:42:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:37,326 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-07-13 19:42:37,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-07-13 19:42:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:37,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:37,327 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:37,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-07-13 19:42:37,527 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 311 times [2021-07-13 19:42:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:37,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672361841] [2021-07-13 19:42:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:37,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672361841] [2021-07-13 19:42:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672361841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451670350] [2021-07-13 19:42:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:37,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:37,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:37,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451670350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:37,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:37,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930472315] [2021-07-13 19:42:37,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:37,802 INFO L87 Difference]: Start difference. First operand 326 states and 987 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:38,040 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-07-13 19:42:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:38,041 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:42:38,041 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:42:38,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:42:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-07-13 19:42:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-13 19:42:38,045 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-13 19:42:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:38,045 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-13 19:42:38,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-13 19:42:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:38,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:38,046 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:38,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-07-13 19:42:38,257 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 312 times [2021-07-13 19:42:38,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:38,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165461543] [2021-07-13 19:42:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165461543] [2021-07-13 19:42:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165461543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252914423] [2021-07-13 19:42:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:38,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252914423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:38,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:38,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396486658] [2021-07-13 19:42:38,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:38,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:38,507 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:38,721 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-07-13 19:42:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:38,722 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:42:38,722 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:42:38,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:42:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-07-13 19:42:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0245398773006134) internal successors, (986), 326 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-07-13 19:42:38,726 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-07-13 19:42:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:38,727 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-07-13 19:42:38,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-07-13 19:42:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:38,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:38,727 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:38,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-07-13 19:42:38,928 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 313 times [2021-07-13 19:42:38,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:38,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082434358] [2021-07-13 19:42:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082434358] [2021-07-13 19:42:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082434358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011778510] [2021-07-13 19:42:38,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011778510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:39,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70852919] [2021-07-13 19:42:39,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:39,193 INFO L87 Difference]: Start difference. First operand 327 states and 986 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:39,424 INFO L93 Difference]: Finished difference Result 443 states and 1276 transitions. [2021-07-13 19:42:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:39,425 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:42:39,425 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:42:39,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:42:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 324. [2021-07-13 19:42:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.021671826625387) internal successors, (976), 323 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-07-13 19:42:39,429 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-07-13 19:42:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:39,429 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-07-13 19:42:39,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-07-13 19:42:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:39,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:39,429 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:39,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-07-13 19:42:39,630 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 314 times [2021-07-13 19:42:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:39,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103859079] [2021-07-13 19:42:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103859079] [2021-07-13 19:42:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103859079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49793258] [2021-07-13 19:42:39,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:39,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49793258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437030417] [2021-07-13 19:42:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:39,894 INFO L87 Difference]: Start difference. First operand 324 states and 976 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:40,061 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-07-13 19:42:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:40,062 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:42:40,062 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:42:40,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:42:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-07-13 19:42:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-07-13 19:42:40,066 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-07-13 19:42:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:40,066 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-07-13 19:42:40,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-07-13 19:42:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:40,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:40,067 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:40,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:40,267 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 315 times [2021-07-13 19:42:40,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:40,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983634840] [2021-07-13 19:42:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:40,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983634840] [2021-07-13 19:42:40,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983634840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402992583] [2021-07-13 19:42:40,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:40,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:40,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402992583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:40,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:40,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374952869] [2021-07-13 19:42:40,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:40,535 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:40,725 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-07-13 19:42:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:40,726 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:42:40,726 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:42:40,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:42:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-07-13 19:42:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-07-13 19:42:40,730 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-07-13 19:42:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:40,730 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-07-13 19:42:40,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-07-13 19:42:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:40,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:40,730 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:40,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3009,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:40,931 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:40,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 316 times [2021-07-13 19:42:40,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:40,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622217673] [2021-07-13 19:42:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622217673] [2021-07-13 19:42:40,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622217673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134800127] [2021-07-13 19:42:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:41,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:41,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134800127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:41,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:41,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461331597] [2021-07-13 19:42:41,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:41,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:41,168 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:41,341 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-07-13 19:42:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:41,342 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:42:41,342 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:42:41,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:42:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-07-13 19:42:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.996774193548387) internal successors, (929), 310 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-07-13 19:42:41,346 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-07-13 19:42:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:41,346 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-07-13 19:42:41,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-07-13 19:42:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:41,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:41,346 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:41,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-07-13 19:42:41,547 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:41,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 317 times [2021-07-13 19:42:41,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:41,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761839742] [2021-07-13 19:42:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:41,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761839742] [2021-07-13 19:42:41,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761839742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259619068] [2021-07-13 19:42:41,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:41,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:41,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:41,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259619068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:41,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:41,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158482544] [2021-07-13 19:42:41,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:41,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:41,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:41,790 INFO L87 Difference]: Start difference. First operand 311 states and 929 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:41,944 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-07-13 19:42:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:41,945 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:42:41,945 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:42:41,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:42:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-07-13 19:42:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9876543209876543) internal successors, (968), 324 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-07-13 19:42:41,949 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-07-13 19:42:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-07-13 19:42:41,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-07-13 19:42:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:41,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:41,950 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:42,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,150 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 318 times [2021-07-13 19:42:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:42,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761282159] [2021-07-13 19:42:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:42,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:42,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761282159] [2021-07-13 19:42:42,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761282159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:42,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324261130] [2021-07-13 19:42:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:42,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:42,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324261130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:42,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:42,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:42,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128197983] [2021-07-13 19:42:42,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:42,392 INFO L87 Difference]: Start difference. First operand 325 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:42,593 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-07-13 19:42:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:42,594 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:42:42,594 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:42:42,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:42:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-07-13 19:42:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-07-13 19:42:42,597 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-07-13 19:42:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-07-13 19:42:42,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-07-13 19:42:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:42,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:42,598 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:42,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,798 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 319 times [2021-07-13 19:42:42,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:42,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974995154] [2021-07-13 19:42:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:42,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974995154] [2021-07-13 19:42:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974995154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911954765] [2021-07-13 19:42:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911954765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:43,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:43,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354662152] [2021-07-13 19:42:43,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:43,054 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:43,212 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-07-13 19:42:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:43,213 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:42:43,213 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:42:43,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:42:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-07-13 19:42:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-07-13 19:42:43,216 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-07-13 19:42:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:43,216 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-07-13 19:42:43,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-07-13 19:42:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:43,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:43,217 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:43,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:43,417 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 320 times [2021-07-13 19:42:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:43,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642819410] [2021-07-13 19:42:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:43,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642819410] [2021-07-13 19:42:43,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642819410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89110884] [2021-07-13 19:42:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:43,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:43,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89110884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:43,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:43,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660180155] [2021-07-13 19:42:43,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:43,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:43,635 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:43,768 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-07-13 19:42:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:43,769 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:42:43,769 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:42:43,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:42:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-07-13 19:42:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.987220447284345) internal successors, (935), 313 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-07-13 19:42:43,772 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-07-13 19:42:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:43,772 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-07-13 19:42:43,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-07-13 19:42:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:43,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:43,773 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:43,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-07-13 19:42:43,973 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 321 times [2021-07-13 19:42:43,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652085814] [2021-07-13 19:42:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652085814] [2021-07-13 19:42:44,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652085814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798546370] [2021-07-13 19:42:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:44,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798546370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:44,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2377202] [2021-07-13 19:42:44,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:44,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:44,183 INFO L87 Difference]: Start difference. First operand 314 states and 935 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:44,334 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-07-13 19:42:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:44,335 INFO L225 Difference]: With dead ends: 354 [2021-07-13 19:42:44,335 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:42:44,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:42:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-07-13 19:42:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.978328173374613) internal successors, (962), 323 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-07-13 19:42:44,339 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-07-13 19:42:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:44,339 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-07-13 19:42:44,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-07-13 19:42:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:44,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:44,340 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:44,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-13 19:42:44,540 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 322 times [2021-07-13 19:42:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:44,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389662181] [2021-07-13 19:42:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:44,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389662181] [2021-07-13 19:42:44,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389662181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897848429] [2021-07-13 19:42:44,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:44,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897848429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:44,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659207955] [2021-07-13 19:42:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:44,756 INFO L87 Difference]: Start difference. First operand 324 states and 962 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:44,872 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-07-13 19:42:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:44,873 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:42:44,873 INFO L226 Difference]: Without dead ends: 325 [2021-07-13 19:42:44,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-13 19:42:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-07-13 19:42:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.990353697749196) internal successors, (930), 311 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-07-13 19:42:44,877 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-07-13 19:42:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:44,877 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-07-13 19:42:44,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-07-13 19:42:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:44,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:44,877 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:45,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,085 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 323 times [2021-07-13 19:42:45,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:45,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356693189] [2021-07-13 19:42:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356693189] [2021-07-13 19:42:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356693189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74166703] [2021-07-13 19:42:45,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74166703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:45,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522115372] [2021-07-13 19:42:45,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:45,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:45,303 INFO L87 Difference]: Start difference. First operand 312 states and 930 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:45,442 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-07-13 19:42:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:45,443 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:42:45,443 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:42:45,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:42:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-07-13 19:42:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-07-13 19:42:45,446 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-07-13 19:42:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:45,447 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-07-13 19:42:45,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-07-13 19:42:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:45,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:45,447 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:45,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-07-13 19:42:45,648 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 324 times [2021-07-13 19:42:45,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:45,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698840697] [2021-07-13 19:42:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698840697] [2021-07-13 19:42:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698840697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468171836] [2021-07-13 19:42:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:45,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468171836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:45,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:45,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890841133] [2021-07-13 19:42:45,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:45,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:45,850 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:45,995 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-07-13 19:42:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:45,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:45,995 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:42:45,995 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:42:45,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:42:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-07-13 19:42:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.984520123839009) internal successors, (964), 323 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-07-13 19:42:45,999 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-07-13 19:42:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:45,999 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-07-13 19:42:45,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-07-13 19:42:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:46,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:46,000 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-07-13 19:42:46,200 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 325 times [2021-07-13 19:42:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:46,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727777657] [2021-07-13 19:42:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:46,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727777657] [2021-07-13 19:42:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727777657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692360541] [2021-07-13 19:42:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:46,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692360541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:46,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:46,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004543637] [2021-07-13 19:42:46,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:46,400 INFO L87 Difference]: Start difference. First operand 324 states and 964 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:46,537 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-07-13 19:42:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:46,537 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:42:46,537 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:42:46,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:42:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-07-13 19:42:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9901960784313726) internal successors, (915), 306 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-07-13 19:42:46,541 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-07-13 19:42:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:46,541 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-07-13 19:42:46,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-07-13 19:42:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:46,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:46,541 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:46,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:46,742 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 326 times [2021-07-13 19:42:46,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:46,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403265412] [2021-07-13 19:42:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:46,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:46,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403265412] [2021-07-13 19:42:46,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403265412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:46,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443753683] [2021-07-13 19:42:46,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:46,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:46,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:46,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:46,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,990 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-07-13 19:42:46,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:46,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:46,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,016 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:47,016 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:47,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:47,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-07-13 19:42:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443753683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:42:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816489107] [2021-07-13 19:42:47,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:42:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:42:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:42:47,081 INFO L87 Difference]: Start difference. First operand 307 states and 915 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:47,531 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-07-13 19:42:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:47,532 INFO L225 Difference]: With dead ends: 377 [2021-07-13 19:42:47,532 INFO L226 Difference]: Without dead ends: 325 [2021-07-13 19:42:47,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-13 19:42:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-07-13 19:42:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-07-13 19:42:47,536 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-07-13 19:42:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:47,536 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-07-13 19:42:47,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-07-13 19:42:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:47,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:47,536 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:47,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-13 19:42:47,737 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 327 times [2021-07-13 19:42:47,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:47,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313211134] [2021-07-13 19:42:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313211134] [2021-07-13 19:42:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313211134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178785120] [2021-07-13 19:42:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:47,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:47,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:47,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:47,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,956 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-07-13 19:42:47,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:47,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,978 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-07-13 19:42:47,978 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-07-13 19:42:47,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:47,978 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:48,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178785120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:48,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:48,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401546094] [2021-07-13 19:42:48,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:48,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:48,018 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:48,229 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-07-13 19:42:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:48,230 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:42:48,231 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:42:48,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:42:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-07-13 19:42:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-13 19:42:48,234 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-13 19:42:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:48,234 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-13 19:42:48,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-13 19:42:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:48,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:48,235 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:48,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-07-13 19:42:48,435 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 328 times [2021-07-13 19:42:48,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:48,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942187709] [2021-07-13 19:42:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942187709] [2021-07-13 19:42:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942187709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102138223] [2021-07-13 19:42:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:48,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:48,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:48,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,661 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-13 19:42:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:48,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:48,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,684 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:48,684 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:48,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-07-13 19:42:48,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:48,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:48,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102138223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:48,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:48,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:48,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810735150] [2021-07-13 19:42:48,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:48,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:48,729 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:49,031 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-07-13 19:42:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:49,032 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:42:49,032 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:42:49,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:42:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-07-13 19:42:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-13 19:42:49,036 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-13 19:42:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:49,037 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-13 19:42:49,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-13 19:42:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:49,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:49,037 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:49,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-13 19:42:49,237 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 329 times [2021-07-13 19:42:49,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:49,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095739539] [2021-07-13 19:42:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:49,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095739539] [2021-07-13 19:42:49,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095739539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816960177] [2021-07-13 19:42:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:49,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:49,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:49,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:49,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:49,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,470 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:49,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:49,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,493 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:49,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:49,494 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:49,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816960177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:49,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:49,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425237834] [2021-07-13 19:42:49,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:49,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:49,542 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:49,756 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-07-13 19:42:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:49,757 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:42:49,757 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:42:49,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:42:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-07-13 19:42:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-13 19:42:49,761 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-13 19:42:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:49,761 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-13 19:42:49,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-13 19:42:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:49,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:49,761 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:49,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-07-13 19:42:49,962 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 330 times [2021-07-13 19:42:49,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:49,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886981010] [2021-07-13 19:42:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886981010] [2021-07-13 19:42:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886981010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026266206] [2021-07-13 19:42:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:50,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:50,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:50,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,162 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-13 19:42:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:50,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:50,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:50,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026266206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:50,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:50,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844569969] [2021-07-13 19:42:50,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:50,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:50,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:50,225 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:50,529 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-07-13 19:42:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:50,530 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:42:50,530 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 19:42:50,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 19:42:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-07-13 19:42:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.006514657980456) internal successors, (923), 307 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-07-13 19:42:50,534 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-07-13 19:42:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:50,534 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-07-13 19:42:50,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-07-13 19:42:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:50,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:50,535 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:50,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-07-13 19:42:50,735 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 331 times [2021-07-13 19:42:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984525705] [2021-07-13 19:42:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:50,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984525705] [2021-07-13 19:42:50,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984525705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104709422] [2021-07-13 19:42:50,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:50,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:50,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:50,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:50,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,981 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:50,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:50,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,005 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:51,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:51,005 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104709422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:51,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829531700] [2021-07-13 19:42:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:51,055 INFO L87 Difference]: Start difference. First operand 308 states and 923 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:51,287 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-07-13 19:42:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:51,288 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:42:51,289 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:42:51,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:42:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-07-13 19:42:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0258064516129033) internal successors, (938), 310 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-07-13 19:42:51,293 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-07-13 19:42:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:51,293 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-07-13 19:42:51,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-07-13 19:42:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:51,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:51,293 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:51,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:51,494 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 332 times [2021-07-13 19:42:51,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:51,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577218611] [2021-07-13 19:42:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577218611] [2021-07-13 19:42:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577218611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394117396] [2021-07-13 19:42:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:51,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:51,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,718 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-13 19:42:51,718 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:51,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:51,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:51,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,765 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-13 19:42:51,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:51,765 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-13 19:42:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394117396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:51,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:51,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:42:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017392446] [2021-07-13 19:42:51,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:51,815 INFO L87 Difference]: Start difference. First operand 311 states and 938 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,030 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-07-13 19:42:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,031 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:42:52,031 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 19:42:52,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 19:42:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-07-13 19:42:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-13 19:42:52,036 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-13 19:42:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-13 19:42:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-13 19:42:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:52,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,036 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-07-13 19:42:52,237 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 333 times [2021-07-13 19:42:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987202682] [2021-07-13 19:42:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987202682] [2021-07-13 19:42:52,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987202682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:52,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585669977] [2021-07-13 19:42:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:52,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:52,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:52,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:52,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:52,464 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-13 19:42:52,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:52,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:52,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:52,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:52,488 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:52,488 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-07-13 19:42:52,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:52,488 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585669977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:52,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:52,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:52,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864260925] [2021-07-13 19:42:52,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:52,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:52,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:52,566 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,957 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-07-13 19:42:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,958 INFO L225 Difference]: With dead ends: 615 [2021-07-13 19:42:52,958 INFO L226 Difference]: Without dead ends: 615 [2021-07-13 19:42:52,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-13 19:42:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-07-13 19:42:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0258899676375406) internal successors, (935), 309 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-07-13 19:42:52,963 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-07-13 19:42:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,963 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-07-13 19:42:52,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,963 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-07-13 19:42:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:52,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,963 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:53,164 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 334 times [2021-07-13 19:42:53,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935396066] [2021-07-13 19:42:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935396066] [2021-07-13 19:42:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935396066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913255480] [2021-07-13 19:42:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:53,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:53,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:53,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:53,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,393 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-13 19:42:53,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:53,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,427 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:53,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:53,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:53,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,451 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:53,451 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:53,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:53,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913255480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:53,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971882064] [2021-07-13 19:42:53,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:53,528 INFO L87 Difference]: Start difference. First operand 310 states and 935 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,782 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-07-13 19:42:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:53,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,783 INFO L225 Difference]: With dead ends: 549 [2021-07-13 19:42:53,783 INFO L226 Difference]: Without dead ends: 543 [2021-07-13 19:42:53,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-13 19:42:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-07-13 19:42:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-13 19:42:53,787 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-13 19:42:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,787 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-13 19:42:53,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-13 19:42:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:53,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,788 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-07-13 19:42:53,988 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 335 times [2021-07-13 19:42:53,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490915306] [2021-07-13 19:42:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490915306] [2021-07-13 19:42:54,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490915306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137953206] [2021-07-13 19:42:54,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:54,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:54,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:54,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:54,219 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-13 19:42:54,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:54,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:54,252 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:54,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:54,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:54,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:54,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:54,275 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:54,275 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:42:54,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:54,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137953206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905593734] [2021-07-13 19:42:54,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:54,355 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,680 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-07-13 19:42:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,681 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:42:54,681 INFO L226 Difference]: Without dead ends: 574 [2021-07-13 19:42:54,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-13 19:42:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-07-13 19:42:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.022875816993464) internal successors, (925), 306 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-07-13 19:42:54,686 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-07-13 19:42:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,686 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-07-13 19:42:54,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-07-13 19:42:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:54,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,687 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-13 19:42:54,888 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 336 times [2021-07-13 19:42:54,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745610462] [2021-07-13 19:42:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745610462] [2021-07-13 19:42:54,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745610462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039174627] [2021-07-13 19:42:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:55,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:55,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:55,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,116 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-13 19:42:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:55,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:55,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,143 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:42:55,143 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-13 19:42:55,143 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-07-13 19:42:55,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:55,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039174627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:55,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662113742] [2021-07-13 19:42:55,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:55,226 INFO L87 Difference]: Start difference. First operand 307 states and 925 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,471 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-07-13 19:42:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:55,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,472 INFO L225 Difference]: With dead ends: 543 [2021-07-13 19:42:55,472 INFO L226 Difference]: Without dead ends: 543 [2021-07-13 19:42:55,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-13 19:42:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-07-13 19:42:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-13 19:42:55,476 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-13 19:42:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,476 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-13 19:42:55,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-13 19:42:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:55,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,477 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-07-13 19:42:55,677 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 337 times [2021-07-13 19:42:55,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423169104] [2021-07-13 19:42:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423169104] [2021-07-13 19:42:55,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423169104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769178654] [2021-07-13 19:42:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:55,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:55,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:55,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:55,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:55,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,901 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-13 19:42:55,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:55,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-13 19:42:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769178654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:55,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:55,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780405657] [2021-07-13 19:42:55,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:55,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:55,977 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:56,215 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-07-13 19:42:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:56,216 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:42:56,216 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:42:56,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:42:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-07-13 19:42:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-07-13 19:42:56,220 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-07-13 19:42:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:56,220 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-07-13 19:42:56,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-07-13 19:42:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:56,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:56,220 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:56,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-07-13 19:42:56,421 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 338 times [2021-07-13 19:42:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:56,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170036277] [2021-07-13 19:42:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170036277] [2021-07-13 19:42:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170036277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567576526] [2021-07-13 19:42:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:56,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:56,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,648 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-13 19:42:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:42:56,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,683 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:42:56,683 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-07-13 19:42:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:56,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:56,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,712 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-13 19:42:56,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:56,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-13 19:42:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567576526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:56,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:56,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220138868] [2021-07-13 19:42:56,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:56,787 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:57,061 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-07-13 19:42:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:57,062 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:42:57,062 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:42:57,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:42:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-07-13 19:42:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-07-13 19:42:57,066 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-07-13 19:42:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:57,066 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-07-13 19:42:57,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-07-13 19:42:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:57,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:57,067 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:57,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,267 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 339 times [2021-07-13 19:42:57,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:57,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676852622] [2021-07-13 19:42:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:57,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676852622] [2021-07-13 19:42:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676852622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468990418] [2021-07-13 19:42:57,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:57,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:57,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:57,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:57,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,484 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:57,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:57,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468990418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:57,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:57,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826650876] [2021-07-13 19:42:57,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:57,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:57,522 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:57,724 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-07-13 19:42:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:57,725 INFO L225 Difference]: With dead ends: 467 [2021-07-13 19:42:57,725 INFO L226 Difference]: Without dead ends: 467 [2021-07-13 19:42:57,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-07-13 19:42:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-07-13 19:42:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0191082802547773) internal successors, (948), 314 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-07-13 19:42:57,729 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-07-13 19:42:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:57,729 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-07-13 19:42:57,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-07-13 19:42:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:57,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:57,730 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:57,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,930 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 340 times [2021-07-13 19:42:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:57,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907949641] [2021-07-13 19:42:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907949641] [2021-07-13 19:42:57,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907949641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130964614] [2021-07-13 19:42:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:58,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:58,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:58,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:58,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,133 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:58,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:58,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130964614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:58,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:58,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120971591] [2021-07-13 19:42:58,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:58,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:58,187 INFO L87 Difference]: Start difference. First operand 315 states and 948 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:58,435 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-07-13 19:42:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:58,436 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:42:58,436 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:42:58,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:42:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-07-13 19:42:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0378548895899056) internal successors, (963), 317 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-07-13 19:42:58,440 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-07-13 19:42:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:58,440 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-07-13 19:42:58,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-07-13 19:42:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:58,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:58,441 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:58,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,641 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:58,642 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 341 times [2021-07-13 19:42:58,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:58,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243891609] [2021-07-13 19:42:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243891609] [2021-07-13 19:42:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243891609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022243377] [2021-07-13 19:42:58,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:58,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:58,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:58,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:58,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,851 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:42:58,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:58,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:42:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022243377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:58,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974533930] [2021-07-13 19:42:58,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:58,903 INFO L87 Difference]: Start difference. First operand 318 states and 963 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:59,125 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-07-13 19:42:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:59,126 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:42:59,126 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:42:59,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:42:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-07-13 19:42:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-13 19:42:59,129 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-13 19:42:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:59,130 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-13 19:42:59,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-13 19:42:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:59,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:59,130 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:59,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3241,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:59,330 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 342 times [2021-07-13 19:42:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:59,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330099536] [2021-07-13 19:42:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330099536] [2021-07-13 19:42:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330099536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033229877] [2021-07-13 19:42:59,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:59,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:42:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033229877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:59,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:42:59,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311794438] [2021-07-13 19:42:59,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:42:59,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:42:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:59,552 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:59,717 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-07-13 19:42:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:42:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:59,718 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:42:59,718 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:42:59,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:42:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-07-13 19:42:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0286624203821657) internal successors, (951), 314 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-07-13 19:42:59,722 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-07-13 19:42:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:59,722 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-07-13 19:42:59,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-07-13 19:42:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:42:59,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:59,723 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:59,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-07-13 19:42:59,923 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 343 times [2021-07-13 19:42:59,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:59,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979944806] [2021-07-13 19:42:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:59,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979944806] [2021-07-13 19:42:59,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979944806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891335145] [2021-07-13 19:42:59,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:00,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891335145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:00,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:00,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859747691] [2021-07-13 19:43:00,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:00,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:00,147 INFO L87 Difference]: Start difference. First operand 315 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:00,370 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-07-13 19:43:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:00,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:00,371 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:43:00,371 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:43:00,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:43:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-07-13 19:43:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.009646302250804) internal successors, (936), 311 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-07-13 19:43:00,375 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-07-13 19:43:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:00,375 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-07-13 19:43:00,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-07-13 19:43:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:00,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:00,375 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:00,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-07-13 19:43:00,576 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 344 times [2021-07-13 19:43:00,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:00,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677216845] [2021-07-13 19:43:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677216845] [2021-07-13 19:43:00,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677216845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978117158] [2021-07-13 19:43:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978117158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:00,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:00,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536564559] [2021-07-13 19:43:00,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:00,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:00,797 INFO L87 Difference]: Start difference. First operand 312 states and 936 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:00,938 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-07-13 19:43:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:00,939 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:43:00,939 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:43:00,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:43:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-07-13 19:43:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-07-13 19:43:00,942 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-07-13 19:43:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:00,942 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-07-13 19:43:00,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-07-13 19:43:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:00,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:00,943 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:01,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:01,143 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:01,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 345 times [2021-07-13 19:43:01,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:01,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541360389] [2021-07-13 19:43:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541360389] [2021-07-13 19:43:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541360389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446286283] [2021-07-13 19:43:01,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:01,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446286283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:01,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924146676] [2021-07-13 19:43:01,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:01,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:01,379 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:01,708 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-07-13 19:43:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:01,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:01,709 INFO L225 Difference]: With dead ends: 510 [2021-07-13 19:43:01,709 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:43:01,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:43:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-07-13 19:43:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.048076923076923) internal successors, (951), 312 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-07-13 19:43:01,714 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-07-13 19:43:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:01,714 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-07-13 19:43:01,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-07-13 19:43:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:01,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:01,714 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:01,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:01,915 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 346 times [2021-07-13 19:43:01,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:01,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012174953] [2021-07-13 19:43:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012174953] [2021-07-13 19:43:01,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012174953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983964020] [2021-07-13 19:43:01,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983964020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:02,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153133433] [2021-07-13 19:43:02,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:02,151 INFO L87 Difference]: Start difference. First operand 313 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:02,346 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-07-13 19:43:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:02,347 INFO L225 Difference]: With dead ends: 444 [2021-07-13 19:43:02,347 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:43:02,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:43:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-07-13 19:43:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-13 19:43:02,350 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-13 19:43:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:02,351 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-13 19:43:02,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-13 19:43:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:02,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:02,351 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:02,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,551 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 347 times [2021-07-13 19:43:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:02,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908967571] [2021-07-13 19:43:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908967571] [2021-07-13 19:43:02,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908967571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595713195] [2021-07-13 19:43:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595713195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:02,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:02,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930294055] [2021-07-13 19:43:02,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:02,790 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:02,987 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-07-13 19:43:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:02,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:02,988 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:43:02,988 INFO L226 Difference]: Without dead ends: 515 [2021-07-13 19:43:02,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-13 19:43:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-07-13 19:43:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.045307443365696) internal successors, (941), 309 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-07-13 19:43:02,992 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-07-13 19:43:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:02,992 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-07-13 19:43:02,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-07-13 19:43:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:02,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:02,993 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:03,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3279 [2021-07-13 19:43:03,193 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 348 times [2021-07-13 19:43:03,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:03,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253439266] [2021-07-13 19:43:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253439266] [2021-07-13 19:43:03,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253439266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434419072] [2021-07-13 19:43:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:03,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:03,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434419072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:03,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:03,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097800473] [2021-07-13 19:43:03,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:03,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:03,457 INFO L87 Difference]: Start difference. First operand 310 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:03,706 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-07-13 19:43:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:03,707 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:43:03,707 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 19:43:03,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 19:43:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-07-13 19:43:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-13 19:43:03,711 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-13 19:43:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:03,711 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-13 19:43:03,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-13 19:43:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:03,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:03,711 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:03,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-07-13 19:43:03,912 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 349 times [2021-07-13 19:43:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:03,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751755408] [2021-07-13 19:43:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751755408] [2021-07-13 19:43:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751755408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812504725] [2021-07-13 19:43:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812504725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471571601] [2021-07-13 19:43:04,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:04,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:04,147 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:04,327 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-07-13 19:43:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:04,328 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:43:04,328 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:43:04,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:43:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-07-13 19:43:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.032258064516129) internal successors, (940), 310 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-07-13 19:43:04,332 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-07-13 19:43:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:04,332 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-07-13 19:43:04,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-07-13 19:43:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:04,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:04,333 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:04,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:04,533 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 350 times [2021-07-13 19:43:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:04,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37537566] [2021-07-13 19:43:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:04,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37537566] [2021-07-13 19:43:04,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37537566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093687801] [2021-07-13 19:43:04,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:04,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:04,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:04,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093687801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:04,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656071252] [2021-07-13 19:43:04,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:04,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:04,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:04,771 INFO L87 Difference]: Start difference. First operand 311 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:05,039 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-07-13 19:43:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:05,040 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:43:05,040 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:43:05,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:43:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-07-13 19:43:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-07-13 19:43:05,044 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-07-13 19:43:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:05,044 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-07-13 19:43:05,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-07-13 19:43:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:05,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:05,045 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:05,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:05,245 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 351 times [2021-07-13 19:43:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:05,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080307893] [2021-07-13 19:43:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:05,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080307893] [2021-07-13 19:43:05,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080307893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505858922] [2021-07-13 19:43:05,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:05,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505858922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:05,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:05,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787932485] [2021-07-13 19:43:05,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:05,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:05,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:05,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:05,514 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:05,722 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-07-13 19:43:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:05,723 INFO L225 Difference]: With dead ends: 429 [2021-07-13 19:43:05,723 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:43:05,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:43:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-07-13 19:43:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0387096774193547) internal successors, (942), 310 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-07-13 19:43:05,727 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-07-13 19:43:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-07-13 19:43:05,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-07-13 19:43:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:05,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:05,727 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:05,928 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 352 times [2021-07-13 19:43:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375585221] [2021-07-13 19:43:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375585221] [2021-07-13 19:43:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375585221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863366207] [2021-07-13 19:43:05,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:06,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863366207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:06,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:06,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241900265] [2021-07-13 19:43:06,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:06,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:06,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:06,164 INFO L87 Difference]: Start difference. First operand 311 states and 942 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:06,388 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-07-13 19:43:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:06,389 INFO L225 Difference]: With dead ends: 423 [2021-07-13 19:43:06,389 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:43:06,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:43:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-07-13 19:43:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.019543973941368) internal successors, (927), 307 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-07-13 19:43:06,393 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-07-13 19:43:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:06,393 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-07-13 19:43:06,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-07-13 19:43:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:06,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:06,393 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:06,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-07-13 19:43:06,593 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 353 times [2021-07-13 19:43:06,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:06,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426103873] [2021-07-13 19:43:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426103873] [2021-07-13 19:43:06,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426103873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752761652] [2021-07-13 19:43:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752761652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:06,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:06,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121243170] [2021-07-13 19:43:06,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:06,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:06,830 INFO L87 Difference]: Start difference. First operand 308 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:07,022 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-07-13 19:43:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:07,024 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:43:07,024 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:43:07,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:43:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-07-13 19:43:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-07-13 19:43:07,028 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-07-13 19:43:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:07,028 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-07-13 19:43:07,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-07-13 19:43:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:07,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:07,029 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:07,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:07,229 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 354 times [2021-07-13 19:43:07,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:07,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780823873] [2021-07-13 19:43:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780823873] [2021-07-13 19:43:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780823873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103604258] [2021-07-13 19:43:07,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:07,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103604258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:07,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447720736] [2021-07-13 19:43:07,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:07,467 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:07,659 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-07-13 19:43:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:07,660 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:43:07,660 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:43:07,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:43:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-07-13 19:43:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.016025641025641) internal successors, (941), 312 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-07-13 19:43:07,664 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-07-13 19:43:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:07,664 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-07-13 19:43:07,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-07-13 19:43:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:07,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:07,664 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:07,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-07-13 19:43:07,865 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 355 times [2021-07-13 19:43:07,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:07,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518620481] [2021-07-13 19:43:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:07,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518620481] [2021-07-13 19:43:07,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518620481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2753920] [2021-07-13 19:43:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2753920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:08,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:08,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026204607] [2021-07-13 19:43:08,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:08,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:08,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:08,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:08,112 INFO L87 Difference]: Start difference. First operand 313 states and 941 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:08,346 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-07-13 19:43:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:08,346 INFO L225 Difference]: With dead ends: 391 [2021-07-13 19:43:08,347 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:43:08,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:43:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-07-13 19:43:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.00974025974026) internal successors, (927), 308 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-07-13 19:43:08,350 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-07-13 19:43:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:08,350 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-07-13 19:43:08,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-07-13 19:43:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:08,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:08,351 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:08,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,551 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 356 times [2021-07-13 19:43:08,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:08,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708056037] [2021-07-13 19:43:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:08,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708056037] [2021-07-13 19:43:08,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708056037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951453105] [2021-07-13 19:43:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:08,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951453105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:08,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:08,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019492326] [2021-07-13 19:43:08,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:08,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:08,784 INFO L87 Difference]: Start difference. First operand 309 states and 927 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:08,979 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-07-13 19:43:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:08,980 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:43:08,980 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:43:08,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:43:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-07-13 19:43:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.00990099009901) internal successors, (912), 303 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-07-13 19:43:08,984 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-07-13 19:43:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:08,984 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-07-13 19:43:08,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-07-13 19:43:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:08,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:08,985 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:09,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,185 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 357 times [2021-07-13 19:43:09,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:09,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300506526] [2021-07-13 19:43:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:09,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300506526] [2021-07-13 19:43:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300506526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989852284] [2021-07-13 19:43:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:09,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:09,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:09,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:09,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:09,383 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:43:09,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:09,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:43:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989852284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:09,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:09,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93509458] [2021-07-13 19:43:09,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:09,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:09,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:09,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:09,419 INFO L87 Difference]: Start difference. First operand 304 states and 912 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:09,596 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-07-13 19:43:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:09,597 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:43:09,597 INFO L226 Difference]: Without dead ends: 446 [2021-07-13 19:43:09,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-13 19:43:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-07-13 19:43:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.006622516556291) internal successors, (908), 302 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-07-13 19:43:09,601 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-07-13 19:43:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:09,601 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-07-13 19:43:09,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-07-13 19:43:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:09,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:09,601 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:09,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,802 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 358 times [2021-07-13 19:43:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:09,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072130836] [2021-07-13 19:43:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072130836] [2021-07-13 19:43:09,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072130836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395326491] [2021-07-13 19:43:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:09,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:09,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:09,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:09,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:09,991 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:43:09,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:09,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:43:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395326491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:10,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:43:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324565487] [2021-07-13 19:43:10,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:10,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:10,030 INFO L87 Difference]: Start difference. First operand 303 states and 908 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:10,214 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-07-13 19:43:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:10,215 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:43:10,215 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:43:10,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:43:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-07-13 19:43:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0262295081967214) internal successors, (923), 305 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-07-13 19:43:10,219 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-07-13 19:43:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:10,219 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-07-13 19:43:10,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-07-13 19:43:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:10,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:10,220 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:10,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:10,420 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 359 times [2021-07-13 19:43:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:10,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893260513] [2021-07-13 19:43:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:10,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893260513] [2021-07-13 19:43:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893260513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140119167] [2021-07-13 19:43:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:10,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:10,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:10,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,605 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:43:10,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:10,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:43:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140119167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:10,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:43:10,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476657772] [2021-07-13 19:43:10,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:10,636 INFO L87 Difference]: Start difference. First operand 306 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:10,802 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-07-13 19:43:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:10,803 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:43:10,803 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:43:10,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:43:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-07-13 19:43:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9864864864864864) internal successors, (884), 296 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-07-13 19:43:10,807 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-07-13 19:43:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:10,807 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-07-13 19:43:10,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-07-13 19:43:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:10,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:10,808 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:11,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3360,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,024 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:11,024 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 360 times [2021-07-13 19:43:11,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:11,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091976505] [2021-07-13 19:43:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091976505] [2021-07-13 19:43:11,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091976505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36577038] [2021-07-13 19:43:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:11,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36577038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:11,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:11,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292196363] [2021-07-13 19:43:11,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:11,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:11,237 INFO L87 Difference]: Start difference. First operand 297 states and 884 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:11,403 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-07-13 19:43:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:11,404 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:43:11,404 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:43:11,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:43:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-07-13 19:43:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-07-13 19:43:11,408 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-07-13 19:43:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-07-13 19:43:11,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-07-13 19:43:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:11,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:11,409 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:11,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,609 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 361 times [2021-07-13 19:43:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:11,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632678219] [2021-07-13 19:43:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632678219] [2021-07-13 19:43:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632678219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395117836] [2021-07-13 19:43:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395117836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:11,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:11,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345891708] [2021-07-13 19:43:11,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:11,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:11,829 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:12,013 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-07-13 19:43:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:12,014 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:43:12,014 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:43:12,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:43:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-07-13 19:43:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9625850340136055) internal successors, (871), 294 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-07-13 19:43:12,017 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-07-13 19:43:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:12,018 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-07-13 19:43:12,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-07-13 19:43:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:12,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:12,018 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:12,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-07-13 19:43:12,219 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 362 times [2021-07-13 19:43:12,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:12,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770306586] [2021-07-13 19:43:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770306586] [2021-07-13 19:43:12,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770306586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240031947] [2021-07-13 19:43:12,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240031947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:12,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375514316] [2021-07-13 19:43:12,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:12,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:12,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:12,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:12,425 INFO L87 Difference]: Start difference. First operand 295 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:12,572 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-07-13 19:43:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:12,573 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:43:12,573 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:43:12,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:43:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-07-13 19:43:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9527272727272726) internal successors, (812), 275 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-07-13 19:43:12,577 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-07-13 19:43:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:12,577 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-07-13 19:43:12,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-07-13 19:43:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:12,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:12,577 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:12,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,778 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 363 times [2021-07-13 19:43:12,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:12,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126564395] [2021-07-13 19:43:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:12,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126564395] [2021-07-13 19:43:12,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126564395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005062294] [2021-07-13 19:43:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005062294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:13,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643766261] [2021-07-13 19:43:13,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:13,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:13,039 INFO L87 Difference]: Start difference. First operand 276 states and 812 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:13,214 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-07-13 19:43:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:13,215 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:43:13,215 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:43:13,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:43:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-07-13 19:43:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9964788732394365) internal successors, (851), 284 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-07-13 19:43:13,218 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-07-13 19:43:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:13,219 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-07-13 19:43:13,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-07-13 19:43:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:13,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:13,219 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:13,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-07-13 19:43:13,420 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:13,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 364 times [2021-07-13 19:43:13,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:13,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393294808] [2021-07-13 19:43:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393294808] [2021-07-13 19:43:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393294808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37771742] [2021-07-13 19:43:13,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:13,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:13,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37771742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:13,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:13,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731691184] [2021-07-13 19:43:13,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:13,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:13,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:13,630 INFO L87 Difference]: Start difference. First operand 285 states and 851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:13,830 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-07-13 19:43:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:13,830 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:43:13,831 INFO L226 Difference]: Without dead ends: 412 [2021-07-13 19:43:13,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-13 19:43:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-07-13 19:43:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9750889679715304) internal successors, (836), 281 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-07-13 19:43:13,834 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-07-13 19:43:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:13,834 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-07-13 19:43:13,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-07-13 19:43:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:13,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:13,835 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:14,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:14,035 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 365 times [2021-07-13 19:43:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:14,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749936426] [2021-07-13 19:43:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749936426] [2021-07-13 19:43:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749936426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973270068] [2021-07-13 19:43:14,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:14,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:14,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973270068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:14,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:14,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603558958] [2021-07-13 19:43:14,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:14,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:14,247 INFO L87 Difference]: Start difference. First operand 282 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:14,422 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-07-13 19:43:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:14,423 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:43:14,423 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:43:14,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:43:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-07-13 19:43:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.964028776978417) internal successors, (824), 278 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-07-13 19:43:14,427 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-07-13 19:43:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:14,427 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-07-13 19:43:14,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-07-13 19:43:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:14,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:14,427 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:14,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-07-13 19:43:14,628 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 366 times [2021-07-13 19:43:14,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:14,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044712286] [2021-07-13 19:43:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044712286] [2021-07-13 19:43:14,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044712286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304278409] [2021-07-13 19:43:14,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:14,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:14,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304278409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:14,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:43:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808531884] [2021-07-13 19:43:14,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:14,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:14,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:14,813 INFO L87 Difference]: Start difference. First operand 279 states and 824 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:14,970 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-07-13 19:43:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:14,971 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:43:14,971 INFO L226 Difference]: Without dead ends: 367 [2021-07-13 19:43:14,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-13 19:43:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-07-13 19:43:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.954225352112676) internal successors, (839), 284 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-07-13 19:43:14,975 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-07-13 19:43:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:14,975 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-07-13 19:43:14,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-07-13 19:43:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:14,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:14,975 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:15,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-07-13 19:43:15,176 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 367 times [2021-07-13 19:43:15,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:15,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922571876] [2021-07-13 19:43:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:15,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922571876] [2021-07-13 19:43:15,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922571876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113823551] [2021-07-13 19:43:15,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113823551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:15,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:15,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498061319] [2021-07-13 19:43:15,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:15,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:15,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:15,421 INFO L87 Difference]: Start difference. First operand 285 states and 839 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:15,673 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2021-07-13 19:43:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:15,674 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:43:15,674 INFO L226 Difference]: Without dead ends: 525 [2021-07-13 19:43:15,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-13 19:43:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2021-07-13 19:43:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.016891891891892) internal successors, (893), 296 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-07-13 19:43:15,678 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-07-13 19:43:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:15,678 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-07-13 19:43:15,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-07-13 19:43:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:15,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:15,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:15,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:15,879 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 368 times [2021-07-13 19:43:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:15,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56673150] [2021-07-13 19:43:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56673150] [2021-07-13 19:43:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56673150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276580660] [2021-07-13 19:43:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:16,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276580660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:16,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868545865] [2021-07-13 19:43:16,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:16,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:16,127 INFO L87 Difference]: Start difference. First operand 297 states and 893 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:16,364 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-07-13 19:43:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:16,365 INFO L225 Difference]: With dead ends: 511 [2021-07-13 19:43:16,365 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 19:43:16,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 19:43:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-07-13 19:43:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-07-13 19:43:16,369 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-07-13 19:43:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:16,369 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-07-13 19:43:16,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-07-13 19:43:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:16,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:16,370 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:16,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-07-13 19:43:16,570 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 369 times [2021-07-13 19:43:16,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:16,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745517534] [2021-07-13 19:43:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745517534] [2021-07-13 19:43:16,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745517534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657192866] [2021-07-13 19:43:16,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:16,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657192866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:16,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:16,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600210001] [2021-07-13 19:43:16,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:16,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:16,816 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:17,208 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-07-13 19:43:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:17,209 INFO L225 Difference]: With dead ends: 582 [2021-07-13 19:43:17,209 INFO L226 Difference]: Without dead ends: 582 [2021-07-13 19:43:17,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-13 19:43:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-07-13 19:43:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-13 19:43:17,214 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-13 19:43:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:17,214 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-13 19:43:17,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-13 19:43:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:17,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:17,214 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:17,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:17,415 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 370 times [2021-07-13 19:43:17,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:17,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011451037] [2021-07-13 19:43:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011451037] [2021-07-13 19:43:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011451037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611455713] [2021-07-13 19:43:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:17,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611455713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:17,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:17,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344958273] [2021-07-13 19:43:17,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:17,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:17,659 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:18,092 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-07-13 19:43:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:18,093 INFO L225 Difference]: With dead ends: 551 [2021-07-13 19:43:18,093 INFO L226 Difference]: Without dead ends: 551 [2021-07-13 19:43:18,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-13 19:43:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-07-13 19:43:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-07-13 19:43:18,098 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-07-13 19:43:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:18,098 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-07-13 19:43:18,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-07-13 19:43:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:18,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:18,098 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:18,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-07-13 19:43:18,299 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 371 times [2021-07-13 19:43:18,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:18,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818647959] [2021-07-13 19:43:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:18,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818647959] [2021-07-13 19:43:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818647959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267247621] [2021-07-13 19:43:18,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267247621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529530234] [2021-07-13 19:43:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:18,554 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:18,939 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-07-13 19:43:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:18,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:18,940 INFO L225 Difference]: With dead ends: 548 [2021-07-13 19:43:18,940 INFO L226 Difference]: Without dead ends: 542 [2021-07-13 19:43:18,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-13 19:43:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-07-13 19:43:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-07-13 19:43:18,945 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-07-13 19:43:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:18,945 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-07-13 19:43:18,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-07-13 19:43:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:18,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:18,945 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:19,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,146 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 372 times [2021-07-13 19:43:19,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:19,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155155712] [2021-07-13 19:43:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155155712] [2021-07-13 19:43:19,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155155712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920257688] [2021-07-13 19:43:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920257688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:19,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:19,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902570426] [2021-07-13 19:43:19,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:19,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:19,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:19,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:19,394 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:19,811 INFO L93 Difference]: Finished difference Result 531 states and 1517 transitions. [2021-07-13 19:43:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:19,812 INFO L225 Difference]: With dead ends: 531 [2021-07-13 19:43:19,812 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:43:19,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:43:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-07-13 19:43:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-07-13 19:43:19,816 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-07-13 19:43:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:19,816 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-07-13 19:43:19,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-07-13 19:43:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:19,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:19,817 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:20,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,017 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 373 times [2021-07-13 19:43:20,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:20,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96233829] [2021-07-13 19:43:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96233829] [2021-07-13 19:43:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96233829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454867370] [2021-07-13 19:43:20,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454867370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:20,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475386911] [2021-07-13 19:43:20,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:20,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:20,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:20,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:20,268 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:20,544 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-07-13 19:43:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:20,545 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:43:20,545 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:43:20,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:43:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-07-13 19:43:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-13 19:43:20,550 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-13 19:43:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:20,550 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-13 19:43:20,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-13 19:43:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:20,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:20,550 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:20,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-07-13 19:43:20,751 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:20,751 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 374 times [2021-07-13 19:43:20,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:20,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393117386] [2021-07-13 19:43:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:20,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393117386] [2021-07-13 19:43:20,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393117386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784104208] [2021-07-13 19:43:20,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:20,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784104208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:21,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:21,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320676272] [2021-07-13 19:43:21,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:21,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:21,002 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:21,335 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-07-13 19:43:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:21,336 INFO L225 Difference]: With dead ends: 502 [2021-07-13 19:43:21,336 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 19:43:21,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 19:43:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-07-13 19:43:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-07-13 19:43:21,340 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-07-13 19:43:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:21,340 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-07-13 19:43:21,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-07-13 19:43:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:21,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:21,341 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:21,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,541 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 375 times [2021-07-13 19:43:21,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:21,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441782093] [2021-07-13 19:43:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:21,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441782093] [2021-07-13 19:43:21,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441782093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770467382] [2021-07-13 19:43:21,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770467382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:21,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371293865] [2021-07-13 19:43:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:21,790 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,052 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-07-13 19:43:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,053 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:43:22,053 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:43:22,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:43:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-07-13 19:43:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-07-13 19:43:22,057 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-07-13 19:43:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,057 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-07-13 19:43:22,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-07-13 19:43:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:22,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,057 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:22,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:22,258 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 376 times [2021-07-13 19:43:22,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:22,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984106719] [2021-07-13 19:43:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:22,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984106719] [2021-07-13 19:43:22,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984106719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091132349] [2021-07-13 19:43:22,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:22,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091132349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:22,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215078396] [2021-07-13 19:43:22,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:22,511 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,748 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-07-13 19:43:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,749 INFO L225 Difference]: With dead ends: 478 [2021-07-13 19:43:22,749 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:43:22,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:43:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-07-13 19:43:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-13 19:43:22,753 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-13 19:43:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-13 19:43:22,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-13 19:43:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:22,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,754 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:22,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:22,954 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 377 times [2021-07-13 19:43:22,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:22,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380719368] [2021-07-13 19:43:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:23,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380719368] [2021-07-13 19:43:23,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380719368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486041566] [2021-07-13 19:43:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:23,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486041566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773437834] [2021-07-13 19:43:23,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:23,221 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:23,537 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-07-13 19:43:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:23,538 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:43:23,538 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 19:43:23,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 19:43:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-07-13 19:43:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-07-13 19:43:23,542 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-07-13 19:43:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:23,542 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-07-13 19:43:23,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-07-13 19:43:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:23,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:23,543 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:23,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,743 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 378 times [2021-07-13 19:43:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:23,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101879827] [2021-07-13 19:43:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:23,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101879827] [2021-07-13 19:43:23,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101879827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225862477] [2021-07-13 19:43:23,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:23,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225862477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:23,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218889429] [2021-07-13 19:43:23,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:23,977 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:24,217 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-07-13 19:43:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:24,218 INFO L225 Difference]: With dead ends: 459 [2021-07-13 19:43:24,218 INFO L226 Difference]: Without dead ends: 459 [2021-07-13 19:43:24,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-13 19:43:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-07-13 19:43:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9966777408637872) internal successors, (902), 301 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-07-13 19:43:24,221 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-07-13 19:43:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:24,222 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-07-13 19:43:24,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-07-13 19:43:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:24,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:24,222 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:24,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-07-13 19:43:24,423 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:24,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 379 times [2021-07-13 19:43:24,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:24,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213157125] [2021-07-13 19:43:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:24,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213157125] [2021-07-13 19:43:24,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213157125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520109111] [2021-07-13 19:43:24,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520109111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:24,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:24,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266672631] [2021-07-13 19:43:24,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:24,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:24,667 INFO L87 Difference]: Start difference. First operand 302 states and 902 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:24,916 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-07-13 19:43:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:24,917 INFO L225 Difference]: With dead ends: 556 [2021-07-13 19:43:24,917 INFO L226 Difference]: Without dead ends: 556 [2021-07-13 19:43:24,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-13 19:43:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-07-13 19:43:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-07-13 19:43:24,921 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-07-13 19:43:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:24,921 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-07-13 19:43:24,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-07-13 19:43:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:24,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:24,922 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:25,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3490,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,122 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 380 times [2021-07-13 19:43:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:25,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941742197] [2021-07-13 19:43:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941742197] [2021-07-13 19:43:25,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941742197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832974112] [2021-07-13 19:43:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:25,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832974112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:25,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147627670] [2021-07-13 19:43:25,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:25,365 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:25,685 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-07-13 19:43:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:25,686 INFO L225 Difference]: With dead ends: 558 [2021-07-13 19:43:25,686 INFO L226 Difference]: Without dead ends: 558 [2021-07-13 19:43:25,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-13 19:43:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-07-13 19:43:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9767441860465116) internal successors, (896), 301 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-07-13 19:43:25,690 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-07-13 19:43:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:25,690 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-07-13 19:43:25,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-07-13 19:43:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:25,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:25,692 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:25,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3496 [2021-07-13 19:43:25,893 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 381 times [2021-07-13 19:43:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216056388] [2021-07-13 19:43:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216056388] [2021-07-13 19:43:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216056388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686428650] [2021-07-13 19:43:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:26,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:26,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686428650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:26,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:26,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953777509] [2021-07-13 19:43:26,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:26,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:26,137 INFO L87 Difference]: Start difference. First operand 302 states and 896 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:26,389 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-07-13 19:43:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:26,391 INFO L225 Difference]: With dead ends: 509 [2021-07-13 19:43:26,391 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 19:43:26,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 19:43:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-07-13 19:43:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.96875) internal successors, (855), 288 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-07-13 19:43:26,395 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-07-13 19:43:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:26,395 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-07-13 19:43:26,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-07-13 19:43:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:26,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:26,396 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:26,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,612 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 382 times [2021-07-13 19:43:26,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:26,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574661491] [2021-07-13 19:43:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:26,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574661491] [2021-07-13 19:43:26,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574661491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169465011] [2021-07-13 19:43:26,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:26,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169465011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:26,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:26,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540288047] [2021-07-13 19:43:26,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:26,830 INFO L87 Difference]: Start difference. First operand 289 states and 855 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:27,043 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-07-13 19:43:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:27,044 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:43:27,044 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:43:27,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:43:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-07-13 19:43:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.957894736842105) internal successors, (843), 285 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-07-13 19:43:27,048 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-07-13 19:43:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:27,048 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-07-13 19:43:27,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-07-13 19:43:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:27,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:27,049 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:27,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3506,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,249 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 383 times [2021-07-13 19:43:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:27,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189996332] [2021-07-13 19:43:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:27,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189996332] [2021-07-13 19:43:27,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189996332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391875848] [2021-07-13 19:43:27,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391875848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:27,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57707163] [2021-07-13 19:43:27,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:27,471 INFO L87 Difference]: Start difference. First operand 286 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:27,706 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-07-13 19:43:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:27,707 INFO L225 Difference]: With dead ends: 442 [2021-07-13 19:43:27,707 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:43:27,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:43:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-07-13 19:43:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9504950495049505) internal successors, (894), 303 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-07-13 19:43:27,711 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-07-13 19:43:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:27,711 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-07-13 19:43:27,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-07-13 19:43:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:27,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:27,712 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,912 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 384 times [2021-07-13 19:43:27,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:27,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709482692] [2021-07-13 19:43:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709482692] [2021-07-13 19:43:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709482692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727282783] [2021-07-13 19:43:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:28,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:28,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727282783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:28,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835233779] [2021-07-13 19:43:28,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:28,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:28,144 INFO L87 Difference]: Start difference. First operand 304 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:28,457 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-07-13 19:43:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:28,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:28,458 INFO L225 Difference]: With dead ends: 448 [2021-07-13 19:43:28,458 INFO L226 Difference]: Without dead ends: 448 [2021-07-13 19:43:28,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-13 19:43:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-07-13 19:43:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.953488372093023) internal successors, (889), 301 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-07-13 19:43:28,462 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-07-13 19:43:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:28,462 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-07-13 19:43:28,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-07-13 19:43:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:28,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:28,463 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:28,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,663 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 385 times [2021-07-13 19:43:28,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:28,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019472747] [2021-07-13 19:43:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019472747] [2021-07-13 19:43:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019472747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273005838] [2021-07-13 19:43:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:28,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273005838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:28,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:43:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281189490] [2021-07-13 19:43:28,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:28,879 INFO L87 Difference]: Start difference. First operand 302 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:29,115 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-07-13 19:43:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:29,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:29,116 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:43:29,116 INFO L226 Difference]: Without dead ends: 431 [2021-07-13 19:43:29,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-13 19:43:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-07-13 19:43:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9565217391304346) internal successors, (884), 299 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-07-13 19:43:29,119 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-07-13 19:43:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:29,120 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-07-13 19:43:29,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-07-13 19:43:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:29,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:29,120 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-07-13 19:43:29,320 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 386 times [2021-07-13 19:43:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171419873] [2021-07-13 19:43:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:29,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171419873] [2021-07-13 19:43:29,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171419873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59742946] [2021-07-13 19:43:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59742946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:29,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:43:29,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795634037] [2021-07-13 19:43:29,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:29,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:29,517 INFO L87 Difference]: Start difference. First operand 300 states and 884 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:29,742 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-07-13 19:43:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:29,743 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:43:29,743 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:43:29,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:43:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-07-13 19:43:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.9547038327526134) internal successors, (848), 287 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-07-13 19:43:29,747 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-07-13 19:43:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:29,747 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-07-13 19:43:29,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-07-13 19:43:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:29,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:29,748 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:29,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,948 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 387 times [2021-07-13 19:43:29,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:29,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967929399] [2021-07-13 19:43:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967929399] [2021-07-13 19:43:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967929399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113584291] [2021-07-13 19:43:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:30,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113584291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:30,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:30,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79240587] [2021-07-13 19:43:30,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:30,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:30,244 INFO L87 Difference]: Start difference. First operand 288 states and 848 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:30,508 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-07-13 19:43:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:30,509 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:43:30,509 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:43:30,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:43:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-07-13 19:43:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.983108108108108) internal successors, (883), 296 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-07-13 19:43:30,512 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-07-13 19:43:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:30,513 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-07-13 19:43:30,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-07-13 19:43:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:30,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:30,513 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-07-13 19:43:30,714 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 388 times [2021-07-13 19:43:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:30,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019973292] [2021-07-13 19:43:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019973292] [2021-07-13 19:43:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019973292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761365147] [2021-07-13 19:43:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:30,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:30,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761365147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:30,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:30,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379905831] [2021-07-13 19:43:30,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:30,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:30,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:30,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:30,999 INFO L87 Difference]: Start difference. First operand 297 states and 883 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:31,302 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-07-13 19:43:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:31,302 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:43:31,302 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:43:31,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:43:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-07-13 19:43:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-07-13 19:43:31,306 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-07-13 19:43:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:31,306 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-07-13 19:43:31,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-07-13 19:43:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:31,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:31,307 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:31,507 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 389 times [2021-07-13 19:43:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828190246] [2021-07-13 19:43:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828190246] [2021-07-13 19:43:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828190246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275129879] [2021-07-13 19:43:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:31,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275129879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:31,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728249422] [2021-07-13 19:43:31,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:31,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:31,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:31,800 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,167 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-07-13 19:43:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,169 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:43:32,169 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:43:32,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:43:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-07-13 19:43:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-13 19:43:32,172 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-07-13 19:43:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,172 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-13 19:43:32,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-13 19:43:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:32,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,173 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:32,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-07-13 19:43:32,373 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 390 times [2021-07-13 19:43:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:32,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574406081] [2021-07-13 19:43:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574406081] [2021-07-13 19:43:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574406081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634052174] [2021-07-13 19:43:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:32,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634052174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:32,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355524673] [2021-07-13 19:43:32,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:32,651 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,917 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-07-13 19:43:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,918 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:43:32,918 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:43:32,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:43:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-07-13 19:43:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.01006711409396) internal successors, (897), 298 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-07-13 19:43:32,922 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-07-13 19:43:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,922 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-07-13 19:43:32,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-07-13 19:43:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:32,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,922 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:33,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-13 19:43:33,123 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 391 times [2021-07-13 19:43:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:33,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241753948] [2021-07-13 19:43:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241753948] [2021-07-13 19:43:33,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241753948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050379048] [2021-07-13 19:43:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050379048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:33,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725223256] [2021-07-13 19:43:33,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:33,418 INFO L87 Difference]: Start difference. First operand 299 states and 897 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:33,684 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-07-13 19:43:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:33,685 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:43:33,685 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:43:33,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:43:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-07-13 19:43:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-13 19:43:33,689 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-13 19:43:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:33,690 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-13 19:43:33,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-13 19:43:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:33,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:33,690 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:33,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,891 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 392 times [2021-07-13 19:43:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:33,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023838475] [2021-07-13 19:43:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023838475] [2021-07-13 19:43:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023838475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596695693] [2021-07-13 19:43:33,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596695693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:34,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980353277] [2021-07-13 19:43:34,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:34,232 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:34,569 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-07-13 19:43:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:34,570 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:43:34,570 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:43:34,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:43:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-07-13 19:43:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.996598639455782) internal successors, (881), 294 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-07-13 19:43:34,574 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-07-13 19:43:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:34,574 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-07-13 19:43:34,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-07-13 19:43:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:34,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:34,574 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:34,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,775 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 393 times [2021-07-13 19:43:34,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:34,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754242320] [2021-07-13 19:43:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:34,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754242320] [2021-07-13 19:43:34,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754242320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886260056] [2021-07-13 19:43:34,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:34,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886260056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:35,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:35,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541631354] [2021-07-13 19:43:35,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:35,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:35,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:35,110 INFO L87 Difference]: Start difference. First operand 295 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:35,422 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-07-13 19:43:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:35,423 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:43:35,423 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:43:35,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:43:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-07-13 19:43:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9759450171821307) internal successors, (866), 291 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-07-13 19:43:35,428 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-07-13 19:43:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:35,428 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-07-13 19:43:35,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-07-13 19:43:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:35,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:35,429 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:35,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:35,630 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 394 times [2021-07-13 19:43:35,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:35,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466868267] [2021-07-13 19:43:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466868267] [2021-07-13 19:43:35,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466868267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621237492] [2021-07-13 19:43:35,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:35,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621237492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:35,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021185337] [2021-07-13 19:43:35,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:35,954 INFO L87 Difference]: Start difference. First operand 292 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:36,228 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-07-13 19:43:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:36,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:36,229 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:43:36,229 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:43:36,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:43:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-07-13 19:43:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9667774086378738) internal successors, (893), 301 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-07-13 19:43:36,233 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-07-13 19:43:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:36,233 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-07-13 19:43:36,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-07-13 19:43:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:36,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:36,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:36,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-07-13 19:43:36,434 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 395 times [2021-07-13 19:43:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:36,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238934284] [2021-07-13 19:43:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:36,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238934284] [2021-07-13 19:43:36,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238934284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370211770] [2021-07-13 19:43:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:36,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:36,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370211770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:36,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332143478] [2021-07-13 19:43:36,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:36,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:36,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:36,767 INFO L87 Difference]: Start difference. First operand 302 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:37,127 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-07-13 19:43:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:37,128 INFO L225 Difference]: With dead ends: 401 [2021-07-13 19:43:37,128 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:43:37,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:43:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-07-13 19:43:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-13 19:43:37,132 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-07-13 19:43:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:37,132 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-13 19:43:37,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-13 19:43:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:37,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:37,132 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:37,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:37,333 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 396 times [2021-07-13 19:43:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56835065] [2021-07-13 19:43:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:37,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:37,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56835065] [2021-07-13 19:43:37,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56835065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:37,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489635586] [2021-07-13 19:43:37,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:37,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:37,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:37,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489635586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:37,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:37,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:37,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546468525] [2021-07-13 19:43:37,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:37,648 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:38,083 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-07-13 19:43:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:38,084 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:43:38,084 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:43:38,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:43:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-07-13 19:43:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9657534246575343) internal successors, (866), 292 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-07-13 19:43:38,087 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-07-13 19:43:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:38,087 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-07-13 19:43:38,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-07-13 19:43:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:38,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:38,087 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:38,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-07-13 19:43:38,288 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 397 times [2021-07-13 19:43:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588008436] [2021-07-13 19:43:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:38,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:38,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588008436] [2021-07-13 19:43:38,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588008436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101169700] [2021-07-13 19:43:38,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101169700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:38,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:38,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460156817] [2021-07-13 19:43:38,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:38,639 INFO L87 Difference]: Start difference. First operand 293 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:39,071 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-07-13 19:43:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:39,072 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:43:39,072 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:43:39,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:43:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-07-13 19:43:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.956953642384106) internal successors, (893), 302 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-07-13 19:43:39,076 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-07-13 19:43:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:39,076 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-07-13 19:43:39,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-07-13 19:43:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:39,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:39,077 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:39,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:39,277 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 398 times [2021-07-13 19:43:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285657138] [2021-07-13 19:43:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285657138] [2021-07-13 19:43:39,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285657138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346622442] [2021-07-13 19:43:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:39,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:39,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346622442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:39,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:39,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179448783] [2021-07-13 19:43:39,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:39,605 INFO L87 Difference]: Start difference. First operand 303 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:39,983 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-07-13 19:43:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:39,984 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:43:39,984 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:43:39,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:43:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-07-13 19:43:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-13 19:43:39,987 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-13 19:43:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:39,988 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-13 19:43:39,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-13 19:43:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:39,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:39,988 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:40,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,188 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 399 times [2021-07-13 19:43:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:40,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895190823] [2021-07-13 19:43:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895190823] [2021-07-13 19:43:40,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895190823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93335407] [2021-07-13 19:43:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93335407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670943281] [2021-07-13 19:43:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:40,505 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:40,732 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2021-07-13 19:43:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:40,733 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:43:40,733 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:43:40,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:43:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2021-07-13 19:43:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.0133779264214047) internal successors, (901), 299 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-07-13 19:43:40,737 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-07-13 19:43:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:40,737 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-07-13 19:43:40,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-07-13 19:43:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:40,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:40,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:40,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,938 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 400 times [2021-07-13 19:43:40,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:40,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109105867] [2021-07-13 19:43:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:41,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109105867] [2021-07-13 19:43:41,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109105867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843232992] [2021-07-13 19:43:41,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:41,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843232992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:41,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803843423] [2021-07-13 19:43:41,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:41,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:41,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:41,248 INFO L87 Difference]: Start difference. First operand 300 states and 901 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:41,447 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-07-13 19:43:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:41,448 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:43:41,448 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:43:41,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:43:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-07-13 19:43:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-13 19:43:41,452 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-13 19:43:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:41,452 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-13 19:43:41,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-13 19:43:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:41,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:41,452 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,653 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 401 times [2021-07-13 19:43:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092831140] [2021-07-13 19:43:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092831140] [2021-07-13 19:43:41,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092831140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692984987] [2021-07-13 19:43:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692984987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:41,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:41,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767070996] [2021-07-13 19:43:41,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:41,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:41,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:41,952 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:42,240 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-07-13 19:43:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:42,241 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:43:42,241 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:43:42,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:43:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-07-13 19:43:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0098360655737704) internal successors, (918), 305 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-07-13 19:43:42,245 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-07-13 19:43:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:42,245 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-07-13 19:43:42,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-07-13 19:43:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:42,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:42,245 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:42,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-07-13 19:43:42,446 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 402 times [2021-07-13 19:43:42,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:42,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987047984] [2021-07-13 19:43:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987047984] [2021-07-13 19:43:42,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987047984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570784520] [2021-07-13 19:43:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:42,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:42,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570784520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:42,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842884631] [2021-07-13 19:43:42,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:42,750 INFO L87 Difference]: Start difference. First operand 306 states and 918 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:43,058 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-07-13 19:43:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:43,059 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:43:43,059 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:43:43,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:43:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-07-13 19:43:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-13 19:43:43,063 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-13 19:43:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:43,063 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-13 19:43:43,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-13 19:43:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:43,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:43,064 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-07-13 19:43:43,264 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 403 times [2021-07-13 19:43:43,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:43,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591409610] [2021-07-13 19:43:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591409610] [2021-07-13 19:43:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591409610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987514514] [2021-07-13 19:43:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987514514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:43,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:43,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367163468] [2021-07-13 19:43:43,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:43,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:43,574 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:43,852 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-07-13 19:43:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:43,853 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:43:43,853 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:43:43,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:43:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-07-13 19:43:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.996732026143791) internal successors, (917), 306 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-07-13 19:43:43,857 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-07-13 19:43:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:43,857 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-07-13 19:43:43,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-07-13 19:43:43,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:43,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:43,857 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:44,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-07-13 19:43:44,058 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 404 times [2021-07-13 19:43:44,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:44,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419778040] [2021-07-13 19:43:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419778040] [2021-07-13 19:43:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419778040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734759778] [2021-07-13 19:43:44,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:44,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734759778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:44,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:44,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651181200] [2021-07-13 19:43:44,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:44,343 INFO L87 Difference]: Start difference. First operand 307 states and 917 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:44,616 INFO L93 Difference]: Finished difference Result 443 states and 1266 transitions. [2021-07-13 19:43:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:44,617 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:43:44,617 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:43:44,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:43:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-07-13 19:43:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9933993399339935) internal successors, (907), 303 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-07-13 19:43:44,621 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-07-13 19:43:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:44,621 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-07-13 19:43:44,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-07-13 19:43:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:44,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:44,622 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:44,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-07-13 19:43:44,822 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 405 times [2021-07-13 19:43:44,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:44,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160851971] [2021-07-13 19:43:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:44,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160851971] [2021-07-13 19:43:44,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160851971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573603725] [2021-07-13 19:43:44,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:44,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573603725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:45,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465190250] [2021-07-13 19:43:45,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:45,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:45,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:45,087 INFO L87 Difference]: Start difference. First operand 304 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:45,250 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-07-13 19:43:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:45,251 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:43:45,251 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:43:45,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:43:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-07-13 19:43:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9901315789473686) internal successors, (909), 304 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-07-13 19:43:45,255 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-07-13 19:43:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:45,255 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-07-13 19:43:45,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-07-13 19:43:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:45,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:45,255 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:45,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,456 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 406 times [2021-07-13 19:43:45,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:45,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644329550] [2021-07-13 19:43:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644329550] [2021-07-13 19:43:45,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644329550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820447695] [2021-07-13 19:43:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:45,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820447695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:45,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:45,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487351837] [2021-07-13 19:43:45,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:45,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:45,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:45,730 INFO L87 Difference]: Start difference. First operand 305 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:45,946 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-07-13 19:43:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:45,947 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:43:45,947 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:43:45,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:43:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-07-13 19:43:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-07-13 19:43:45,950 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-07-13 19:43:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:45,950 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-07-13 19:43:45,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-07-13 19:43:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:45,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:45,951 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:46,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-13 19:43:46,151 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 407 times [2021-07-13 19:43:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:46,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105116837] [2021-07-13 19:43:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105116837] [2021-07-13 19:43:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105116837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095595183] [2021-07-13 19:43:46,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:46,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095595183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:46,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336676329] [2021-07-13 19:43:46,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:46,416 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:46,607 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-07-13 19:43:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:46,608 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:43:46,608 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:43:46,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:43:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-07-13 19:43:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-07-13 19:43:46,611 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-07-13 19:43:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:46,612 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-07-13 19:43:46,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-07-13 19:43:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:46,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:46,612 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:46,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3719 [2021-07-13 19:43:46,812 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 408 times [2021-07-13 19:43:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:46,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865131659] [2021-07-13 19:43:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865131659] [2021-07-13 19:43:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865131659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983913374] [2021-07-13 19:43:46,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:46,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:46,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983913374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:47,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743149993] [2021-07-13 19:43:47,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:47,070 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:47,259 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-07-13 19:43:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:47,260 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:43:47,260 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:43:47,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:43:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-07-13 19:43:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9572368421052633) internal successors, (899), 304 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-07-13 19:43:47,264 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-07-13 19:43:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:47,264 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-07-13 19:43:47,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-07-13 19:43:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:47,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:47,264 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:47,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,465 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 409 times [2021-07-13 19:43:47,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:47,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190292434] [2021-07-13 19:43:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190292434] [2021-07-13 19:43:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190292434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53438857] [2021-07-13 19:43:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53438857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:47,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:47,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266669456] [2021-07-13 19:43:47,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:47,727 INFO L87 Difference]: Start difference. First operand 305 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:47,973 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-07-13 19:43:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:47,974 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:43:47,974 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:43:47,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:43:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-07-13 19:43:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9602649006622515) internal successors, (894), 302 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-07-13 19:43:47,977 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-07-13 19:43:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:47,977 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-07-13 19:43:47,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-07-13 19:43:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:47,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:47,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-07-13 19:43:48,178 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 410 times [2021-07-13 19:43:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564051888] [2021-07-13 19:43:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564051888] [2021-07-13 19:43:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564051888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851210613] [2021-07-13 19:43:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:48,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851210613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:48,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:48,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154107649] [2021-07-13 19:43:48,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:48,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:48,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:48,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:48,465 INFO L87 Difference]: Start difference. First operand 303 states and 894 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:48,689 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-07-13 19:43:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:48,694 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:43:48,694 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:43:48,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:43:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-07-13 19:43:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-13 19:43:48,697 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-13 19:43:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:48,697 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-13 19:43:48,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-13 19:43:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:48,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:48,698 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:48,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:48,898 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 411 times [2021-07-13 19:43:48,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:48,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841743230] [2021-07-13 19:43:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841743230] [2021-07-13 19:43:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841743230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857254497] [2021-07-13 19:43:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:49,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:49,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857254497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:49,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:49,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840750568] [2021-07-13 19:43:49,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:49,157 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:49,410 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-07-13 19:43:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:49,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:49,411 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:43:49,411 INFO L226 Difference]: Without dead ends: 319 [2021-07-13 19:43:49,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-13 19:43:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-07-13 19:43:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-13 19:43:49,414 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-13 19:43:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:49,415 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-13 19:43:49,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-13 19:43:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:49,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:49,415 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:49,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3753 [2021-07-13 19:43:49,615 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 412 times [2021-07-13 19:43:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:49,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850167622] [2021-07-13 19:43:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850167622] [2021-07-13 19:43:49,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850167622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103711016] [2021-07-13 19:43:49,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:49,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:49,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103711016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:49,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576781684] [2021-07-13 19:43:49,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:49,875 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:50,117 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-07-13 19:43:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:50,118 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:43:50,118 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:43:50,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:43:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-07-13 19:43:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.947194719471947) internal successors, (893), 303 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-07-13 19:43:50,122 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-07-13 19:43:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:50,122 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-07-13 19:43:50,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-07-13 19:43:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:50,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:50,122 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:50,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-07-13 19:43:50,323 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 413 times [2021-07-13 19:43:50,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:50,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519353026] [2021-07-13 19:43:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519353026] [2021-07-13 19:43:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519353026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641770750] [2021-07-13 19:43:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:50,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641770750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:50,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:50,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464761375] [2021-07-13 19:43:50,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:50,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:50,581 INFO L87 Difference]: Start difference. First operand 304 states and 893 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:50,821 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-07-13 19:43:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:50,822 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:43:50,822 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:43:50,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:43:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-07-13 19:43:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-13 19:43:50,826 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-13 19:43:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:50,826 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-13 19:43:50,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-13 19:43:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:50,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:50,826 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:51,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,027 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 414 times [2021-07-13 19:43:51,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:51,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486252663] [2021-07-13 19:43:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:51,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486252663] [2021-07-13 19:43:51,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486252663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688070991] [2021-07-13 19:43:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688070991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:51,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865403487] [2021-07-13 19:43:51,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:51,265 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:51,445 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-07-13 19:43:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:51,446 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:43:51,446 INFO L226 Difference]: Without dead ends: 356 [2021-07-13 19:43:51,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-13 19:43:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-07-13 19:43:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9508196721311477) internal successors, (900), 305 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-07-13 19:43:51,450 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-07-13 19:43:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:51,450 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-07-13 19:43:51,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-07-13 19:43:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:51,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:51,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:51,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,651 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 415 times [2021-07-13 19:43:51,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:51,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225356186] [2021-07-13 19:43:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225356186] [2021-07-13 19:43:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225356186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551904816] [2021-07-13 19:43:51,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551904816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:51,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723017352] [2021-07-13 19:43:51,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:51,905 INFO L87 Difference]: Start difference. First operand 306 states and 900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:52,099 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-07-13 19:43:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:52,100 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:43:52,100 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 19:43:52,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 19:43:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-07-13 19:43:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-07-13 19:43:52,103 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-07-13 19:43:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:52,104 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-07-13 19:43:52,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-07-13 19:43:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:52,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:52,104 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,305 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 416 times [2021-07-13 19:43:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312456370] [2021-07-13 19:43:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:52,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312456370] [2021-07-13 19:43:52,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312456370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280094855] [2021-07-13 19:43:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:52,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280094855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:43:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172006222] [2021-07-13 19:43:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:52,552 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:52,727 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-07-13 19:43:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:52,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:52,728 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:43:52,728 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:43:52,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:43:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-07-13 19:43:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-07-13 19:43:52,732 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-07-13 19:43:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:52,732 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-07-13 19:43:52,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-07-13 19:43:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:52,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:52,732 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-07-13 19:43:52,933 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 417 times [2021-07-13 19:43:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108927036] [2021-07-13 19:43:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:53,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108927036] [2021-07-13 19:43:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108927036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320977487] [2021-07-13 19:43:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320977487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:53,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737266132] [2021-07-13 19:43:53,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:53,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:53,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:53,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:53,266 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:53,469 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-07-13 19:43:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:53,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:53,470 INFO L225 Difference]: With dead ends: 514 [2021-07-13 19:43:53,470 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 19:43:53,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 19:43:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2021-07-13 19:43:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.02) internal successors, (906), 300 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-07-13 19:43:53,474 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-07-13 19:43:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:53,474 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-07-13 19:43:53,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-07-13 19:43:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:53,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:53,475 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:53,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,675 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:53,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 418 times [2021-07-13 19:43:53,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:53,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733148485] [2021-07-13 19:43:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733148485] [2021-07-13 19:43:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733148485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416466736] [2021-07-13 19:43:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:53,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:53,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416466736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223253591] [2021-07-13 19:43:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:53,938 INFO L87 Difference]: Start difference. First operand 301 states and 906 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,133 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-07-13 19:43:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,134 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:43:54,134 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 19:43:54,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 19:43:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-07-13 19:43:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-07-13 19:43:54,138 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-07-13 19:43:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,138 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-07-13 19:43:54,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-07-13 19:43:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:54,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,139 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:54,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-07-13 19:43:54,339 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 419 times [2021-07-13 19:43:54,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:54,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791321841] [2021-07-13 19:43:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:54,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:54,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791321841] [2021-07-13 19:43:54,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791321841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:54,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720332789] [2021-07-13 19:43:54,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:54,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:54,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:54,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720332789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:54,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:54,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:54,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472604466] [2021-07-13 19:43:54,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:54,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:54,630 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,981 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-07-13 19:43:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,982 INFO L225 Difference]: With dead ends: 572 [2021-07-13 19:43:54,982 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:43:54,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:43:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-07-13 19:43:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0163398692810457) internal successors, (923), 306 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-07-13 19:43:54,987 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-07-13 19:43:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,987 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-07-13 19:43:54,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-07-13 19:43:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:54,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,987 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:55,188 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 420 times [2021-07-13 19:43:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841926936] [2021-07-13 19:43:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841926936] [2021-07-13 19:43:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841926936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948637967] [2021-07-13 19:43:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:55,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:55,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:55,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948637967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:55,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:55,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909413964] [2021-07-13 19:43:55,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:55,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:55,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:55,484 INFO L87 Difference]: Start difference. First operand 307 states and 923 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:55,796 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-07-13 19:43:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:55,797 INFO L225 Difference]: With dead ends: 535 [2021-07-13 19:43:55,797 INFO L226 Difference]: Without dead ends: 535 [2021-07-13 19:43:55,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-13 19:43:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-07-13 19:43:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-07-13 19:43:55,802 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-07-13 19:43:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-07-13 19:43:55,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-07-13 19:43:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:55,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:55,802 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:56,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-07-13 19:43:56,003 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 421 times [2021-07-13 19:43:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:56,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91753206] [2021-07-13 19:43:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91753206] [2021-07-13 19:43:56,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91753206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245258885] [2021-07-13 19:43:56,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245258885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:56,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967093922] [2021-07-13 19:43:56,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:56,280 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:56,595 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-07-13 19:43:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:56,596 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:43:56,596 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:43:56,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:43:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-07-13 19:43:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.003257328990228) internal successors, (922), 307 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-07-13 19:43:56,601 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-07-13 19:43:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:56,601 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-07-13 19:43:56,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-07-13 19:43:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:56,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:56,601 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:56,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,802 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 422 times [2021-07-13 19:43:56,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:56,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168458141] [2021-07-13 19:43:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168458141] [2021-07-13 19:43:56,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168458141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768554875] [2021-07-13 19:43:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768554875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522777708] [2021-07-13 19:43:57,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:57,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:57,087 INFO L87 Difference]: Start difference. First operand 308 states and 922 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:57,459 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2021-07-13 19:43:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:57,460 INFO L225 Difference]: With dead ends: 543 [2021-07-13 19:43:57,460 INFO L226 Difference]: Without dead ends: 543 [2021-07-13 19:43:57,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-13 19:43:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2021-07-13 19:43:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-07-13 19:43:57,465 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-07-13 19:43:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:57,465 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-07-13 19:43:57,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-07-13 19:43:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:57,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:57,465 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:57,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:57,666 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 423 times [2021-07-13 19:43:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:57,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105043946] [2021-07-13 19:43:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105043946] [2021-07-13 19:43:57,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105043946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457129285] [2021-07-13 19:43:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:57,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457129285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824527262] [2021-07-13 19:43:57,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:57,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:57,942 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:58,093 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-07-13 19:43:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:58,094 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:43:58,095 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:43:58,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:43:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-07-13 19:43:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.029032258064516) internal successors, (939), 310 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-07-13 19:43:58,103 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-07-13 19:43:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:58,103 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-07-13 19:43:58,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-07-13 19:43:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:58,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:58,104 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:58,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:58,304 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 424 times [2021-07-13 19:43:58,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:58,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381118941] [2021-07-13 19:43:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:58,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381118941] [2021-07-13 19:43:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381118941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462196286] [2021-07-13 19:43:58,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:58,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:58,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462196286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:58,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:58,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084931718] [2021-07-13 19:43:58,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:58,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:58,576 INFO L87 Difference]: Start difference. First operand 311 states and 939 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:58,798 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-07-13 19:43:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:58,799 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:43:58,799 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 19:43:58,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 19:43:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-07-13 19:43:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-07-13 19:43:58,803 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-07-13 19:43:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:58,803 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-07-13 19:43:58,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-07-13 19:43:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:58,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:58,803 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:59,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,004 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 425 times [2021-07-13 19:43:59,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:59,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264896465] [2021-07-13 19:43:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264896465] [2021-07-13 19:43:59,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264896465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844934937] [2021-07-13 19:43:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:59,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844934937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:59,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:43:59,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861495353] [2021-07-13 19:43:59,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:43:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:43:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:59,311 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:59,509 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-07-13 19:43:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:43:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:59,510 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:43:59,510 INFO L226 Difference]: Without dead ends: 460 [2021-07-13 19:43:59,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-07-13 19:43:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-07-13 19:43:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-07-13 19:43:59,514 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-07-13 19:43:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:59,514 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-07-13 19:43:59,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-07-13 19:43:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:43:59,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:59,515 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:59,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3859,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,729 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 426 times [2021-07-13 19:43:59,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:59,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994402449] [2021-07-13 19:43:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994402449] [2021-07-13 19:43:59,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994402449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812581092] [2021-07-13 19:43:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:59,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:59,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812581092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:00,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:00,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538313049] [2021-07-13 19:44:00,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:00,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:00,021 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:00,241 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-07-13 19:44:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:00,242 INFO L225 Difference]: With dead ends: 499 [2021-07-13 19:44:00,242 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:44:00,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:44:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-07-13 19:44:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0064102564102564) internal successors, (938), 312 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-07-13 19:44:00,246 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-07-13 19:44:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:00,246 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-07-13 19:44:00,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-07-13 19:44:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:00,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:00,246 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:00,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,447 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 427 times [2021-07-13 19:44:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408293442] [2021-07-13 19:44:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:00,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408293442] [2021-07-13 19:44:00,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408293442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446499631] [2021-07-13 19:44:00,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446499631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:00,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:00,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260846664] [2021-07-13 19:44:00,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:00,746 INFO L87 Difference]: Start difference. First operand 313 states and 938 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:01,028 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-07-13 19:44:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:01,029 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:44:01,029 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 19:44:01,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 19:44:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-07-13 19:44:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-13 19:44:01,033 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-13 19:44:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:01,033 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-13 19:44:01,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-13 19:44:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:01,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:01,034 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:01,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:01,234 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 428 times [2021-07-13 19:44:01,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680748077] [2021-07-13 19:44:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680748077] [2021-07-13 19:44:01,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680748077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839564286] [2021-07-13 19:44:01,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:01,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839564286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:01,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:01,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901253330] [2021-07-13 19:44:01,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:01,537 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:01,727 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-07-13 19:44:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:01,728 INFO L225 Difference]: With dead ends: 480 [2021-07-13 19:44:01,728 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:44:01,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:44:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-07-13 19:44:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-07-13 19:44:01,732 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-07-13 19:44:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:01,732 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-07-13 19:44:01,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-07-13 19:44:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:01,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:01,732 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:01,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:01,933 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 429 times [2021-07-13 19:44:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550103256] [2021-07-13 19:44:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550103256] [2021-07-13 19:44:02,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550103256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808076336] [2021-07-13 19:44:02,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:02,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:02,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808076336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:02,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:02,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129001731] [2021-07-13 19:44:02,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:02,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:02,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:02,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:02,227 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:02,448 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-07-13 19:44:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:02,449 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:44:02,450 INFO L226 Difference]: Without dead ends: 504 [2021-07-13 19:44:02,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-13 19:44:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-07-13 19:44:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-13 19:44:02,454 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-13 19:44:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:02,454 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-13 19:44:02,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-13 19:44:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:02,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:02,454 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:02,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,655 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 430 times [2021-07-13 19:44:02,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:02,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684164233] [2021-07-13 19:44:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:02,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684164233] [2021-07-13 19:44:02,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684164233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765522068] [2021-07-13 19:44:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765522068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:02,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:02,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168645918] [2021-07-13 19:44:02,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:02,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:02,956 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:03,216 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-07-13 19:44:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:03,218 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:44:03,218 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:44:03,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:44:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-07-13 19:44:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.980327868852459) internal successors, (909), 305 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-07-13 19:44:03,222 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-07-13 19:44:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:03,222 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-07-13 19:44:03,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-07-13 19:44:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:03,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:03,222 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:03,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:03,423 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 431 times [2021-07-13 19:44:03,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:03,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330500274] [2021-07-13 19:44:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330500274] [2021-07-13 19:44:03,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330500274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023547494] [2021-07-13 19:44:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:03,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023547494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:03,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:03,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292392568] [2021-07-13 19:44:03,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:03,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:03,731 INFO L87 Difference]: Start difference. First operand 306 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:03,953 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-07-13 19:44:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:03,954 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:44:03,954 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:44:03,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:44:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-07-13 19:44:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9726027397260273) internal successors, (868), 292 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-07-13 19:44:03,958 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-07-13 19:44:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:03,958 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-07-13 19:44:03,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-07-13 19:44:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:03,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:03,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:04,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,159 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 432 times [2021-07-13 19:44:04,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:04,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132505526] [2021-07-13 19:44:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132505526] [2021-07-13 19:44:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132505526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190519038] [2021-07-13 19:44:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:04,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190519038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:04,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147406140] [2021-07-13 19:44:04,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:04,420 INFO L87 Difference]: Start difference. First operand 293 states and 868 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:04,612 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-07-13 19:44:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:04,613 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:44:04,613 INFO L226 Difference]: Without dead ends: 474 [2021-07-13 19:44:04,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-13 19:44:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-07-13 19:44:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-13 19:44:04,618 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-13 19:44:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:04,618 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-13 19:44:04,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-13 19:44:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:04,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:04,619 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:04,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,819 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 433 times [2021-07-13 19:44:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:04,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559316022] [2021-07-13 19:44:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:04,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559316022] [2021-07-13 19:44:04,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559316022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165366213] [2021-07-13 19:44:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165366213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:05,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:05,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683084093] [2021-07-13 19:44:05,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:05,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:05,091 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:05,320 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-07-13 19:44:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:05,321 INFO L225 Difference]: With dead ends: 539 [2021-07-13 19:44:05,321 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 19:44:05,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 19:44:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-07-13 19:44:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-07-13 19:44:05,327 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-07-13 19:44:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:05,327 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-07-13 19:44:05,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-07-13 19:44:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:05,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:05,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:05,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,528 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 434 times [2021-07-13 19:44:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:05,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204168472] [2021-07-13 19:44:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:05,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204168472] [2021-07-13 19:44:05,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204168472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301948610] [2021-07-13 19:44:05,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301948610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:05,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96163660] [2021-07-13 19:44:05,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:05,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:05,829 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:06,159 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-07-13 19:44:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:06,161 INFO L225 Difference]: With dead ends: 545 [2021-07-13 19:44:06,161 INFO L226 Difference]: Without dead ends: 545 [2021-07-13 19:44:06,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-13 19:44:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-07-13 19:44:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.957377049180328) internal successors, (902), 305 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-07-13 19:44:06,165 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-07-13 19:44:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:06,165 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-07-13 19:44:06,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-07-13 19:44:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:06,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:06,166 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:06,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3925,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:06,366 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 435 times [2021-07-13 19:44:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:06,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364138161] [2021-07-13 19:44:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364138161] [2021-07-13 19:44:06,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364138161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152935710] [2021-07-13 19:44:06,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152935710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:06,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:06,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758540796] [2021-07-13 19:44:06,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:06,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:06,650 INFO L87 Difference]: Start difference. First operand 306 states and 902 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:06,913 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-07-13 19:44:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:06,914 INFO L225 Difference]: With dead ends: 528 [2021-07-13 19:44:06,914 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:44:06,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:44:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-07-13 19:44:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-07-13 19:44:06,920 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-07-13 19:44:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:06,920 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-07-13 19:44:06,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-07-13 19:44:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:06,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:06,921 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:07,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-07-13 19:44:07,121 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 436 times [2021-07-13 19:44:07,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:07,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254385143] [2021-07-13 19:44:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:07,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254385143] [2021-07-13 19:44:07,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254385143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158821984] [2021-07-13 19:44:07,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:07,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158821984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:07,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:07,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935745619] [2021-07-13 19:44:07,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:07,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:07,412 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:07,622 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-07-13 19:44:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:07,623 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:44:07,624 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:44:07,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:44:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-07-13 19:44:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-07-13 19:44:07,628 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-07-13 19:44:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:07,628 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-07-13 19:44:07,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-07-13 19:44:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:07,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:07,628 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:07,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:07,829 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 437 times [2021-07-13 19:44:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:07,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535238833] [2021-07-13 19:44:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:07,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535238833] [2021-07-13 19:44:07,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535238833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482999457] [2021-07-13 19:44:07,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:07,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482999457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:08,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:08,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907843528] [2021-07-13 19:44:08,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:08,088 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:08,340 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-07-13 19:44:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:08,341 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:44:08,341 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:44:08,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:44:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-07-13 19:44:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9489795918367347) internal successors, (867), 294 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-07-13 19:44:08,344 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-07-13 19:44:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:08,345 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-07-13 19:44:08,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-07-13 19:44:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:08,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:08,345 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:08,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,546 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:08,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 438 times [2021-07-13 19:44:08,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:08,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258548151] [2021-07-13 19:44:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:08,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258548151] [2021-07-13 19:44:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258548151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762163955] [2021-07-13 19:44:08,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762163955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:08,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:08,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969483482] [2021-07-13 19:44:08,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:08,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:08,801 INFO L87 Difference]: Start difference. First operand 295 states and 867 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:09,062 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-07-13 19:44:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:09,063 INFO L225 Difference]: With dead ends: 353 [2021-07-13 19:44:09,063 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:44:09,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:44:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-07-13 19:44:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9407894736842106) internal successors, (894), 304 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-07-13 19:44:09,067 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-07-13 19:44:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:09,067 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-07-13 19:44:09,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-07-13 19:44:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:09,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:09,068 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-07-13 19:44:09,268 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 439 times [2021-07-13 19:44:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:09,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741972646] [2021-07-13 19:44:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:09,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741972646] [2021-07-13 19:44:09,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741972646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663310804] [2021-07-13 19:44:09,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663310804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:09,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087346605] [2021-07-13 19:44:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:09,528 INFO L87 Difference]: Start difference. First operand 305 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:09,717 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-07-13 19:44:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:09,718 INFO L225 Difference]: With dead ends: 324 [2021-07-13 19:44:09,718 INFO L226 Difference]: Without dead ends: 324 [2021-07-13 19:44:09,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-13 19:44:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-07-13 19:44:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.952054794520548) internal successors, (862), 292 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-07-13 19:44:09,721 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-07-13 19:44:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-07-13 19:44:09,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-07-13 19:44:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:09,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:09,722 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:09,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:09,922 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 440 times [2021-07-13 19:44:09,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:09,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238485330] [2021-07-13 19:44:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238485330] [2021-07-13 19:44:09,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238485330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113294402] [2021-07-13 19:44:09,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:10,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113294402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:10,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:10,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477205680] [2021-07-13 19:44:10,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:10,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:10,135 INFO L87 Difference]: Start difference. First operand 293 states and 862 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:10,272 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-07-13 19:44:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:10,273 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:44:10,273 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:44:10,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:44:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-07-13 19:44:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9444444444444446) internal successors, (901), 306 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-07-13 19:44:10,276 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-07-13 19:44:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:10,276 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-07-13 19:44:10,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-07-13 19:44:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:10,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:10,277 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:10,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-13 19:44:10,477 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 441 times [2021-07-13 19:44:10,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:10,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645466124] [2021-07-13 19:44:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:10,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645466124] [2021-07-13 19:44:10,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645466124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972499360] [2021-07-13 19:44:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972499360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:10,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:10,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006413511] [2021-07-13 19:44:10,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:10,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:10,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:10,696 INFO L87 Difference]: Start difference. First operand 307 states and 901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:10,855 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-07-13 19:44:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:10,856 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:44:10,856 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:44:10,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:44:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-07-13 19:44:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9473684210526314) internal successors, (896), 304 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-07-13 19:44:10,859 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-07-13 19:44:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:10,859 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-07-13 19:44:10,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-07-13 19:44:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:10,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:10,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:11,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,060 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 442 times [2021-07-13 19:44:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903763522] [2021-07-13 19:44:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903763522] [2021-07-13 19:44:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903763522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184299801] [2021-07-13 19:44:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:11,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184299801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:11,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035944140] [2021-07-13 19:44:11,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:11,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:11,273 INFO L87 Difference]: Start difference. First operand 305 states and 896 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:11,407 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-07-13 19:44:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:11,407 INFO L225 Difference]: With dead ends: 334 [2021-07-13 19:44:11,408 INFO L226 Difference]: Without dead ends: 334 [2021-07-13 19:44:11,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-13 19:44:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-07-13 19:44:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-07-13 19:44:11,411 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-07-13 19:44:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:11,411 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-07-13 19:44:11,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-07-13 19:44:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:11,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:11,411 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:11,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,445 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,612 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 443 times [2021-07-13 19:44:11,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:11,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295979676] [2021-07-13 19:44:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295979676] [2021-07-13 19:44:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295979676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101101680] [2021-07-13 19:44:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:11,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101101680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:11,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:11,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212969541] [2021-07-13 19:44:11,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:11,835 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:11,978 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-07-13 19:44:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:11,979 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:44:11,979 INFO L226 Difference]: Without dead ends: 412 [2021-07-13 19:44:11,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-13 19:44:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-07-13 19:44:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.948051948051948) internal successors, (908), 308 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-07-13 19:44:11,982 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-07-13 19:44:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:11,983 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-07-13 19:44:11,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-07-13 19:44:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:11,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:11,983 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:12,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,183 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 444 times [2021-07-13 19:44:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:12,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756247897] [2021-07-13 19:44:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756247897] [2021-07-13 19:44:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756247897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415574669] [2021-07-13 19:44:12,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:12,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415574669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:12,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748122969] [2021-07-13 19:44:12,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:12,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:12,405 INFO L87 Difference]: Start difference. First operand 309 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:12,562 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-07-13 19:44:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:12,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:12,563 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:44:12,563 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:44:12,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:44:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-07-13 19:44:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.950980392156863) internal successors, (903), 306 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-07-13 19:44:12,567 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-07-13 19:44:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:12,567 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-07-13 19:44:12,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-07-13 19:44:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:12,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:12,567 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:12,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-13 19:44:12,768 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 445 times [2021-07-13 19:44:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:12,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307214823] [2021-07-13 19:44:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:12,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307214823] [2021-07-13 19:44:12,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307214823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537200845] [2021-07-13 19:44:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:12,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537200845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:13,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660985266] [2021-07-13 19:44:13,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:13,005 INFO L87 Difference]: Start difference. First operand 307 states and 903 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:13,168 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-07-13 19:44:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:13,169 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:44:13,169 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:44:13,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:44:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-07-13 19:44:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9539473684210527) internal successors, (898), 304 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-07-13 19:44:13,173 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-07-13 19:44:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:13,173 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-07-13 19:44:13,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-07-13 19:44:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:13,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:13,173 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:13,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,374 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 446 times [2021-07-13 19:44:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:13,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122357696] [2021-07-13 19:44:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122357696] [2021-07-13 19:44:13,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122357696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81838672] [2021-07-13 19:44:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81838672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:13,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:13,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863335246] [2021-07-13 19:44:13,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:13,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:13,573 INFO L87 Difference]: Start difference. First operand 305 states and 898 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:13,726 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-07-13 19:44:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:13,727 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:44:13,727 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:44:13,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:44:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-07-13 19:44:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-07-13 19:44:13,731 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-07-13 19:44:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:13,731 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-07-13 19:44:13,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-07-13 19:44:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:13,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:13,731 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:13,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,932 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 447 times [2021-07-13 19:44:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:13,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529762570] [2021-07-13 19:44:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:14,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529762570] [2021-07-13 19:44:14,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529762570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876807754] [2021-07-13 19:44:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:14,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:14,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876807754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:14,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:14,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955731495] [2021-07-13 19:44:14,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:14,258 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:14,767 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-07-13 19:44:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:14,768 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:44:14,768 INFO L226 Difference]: Without dead ends: 592 [2021-07-13 19:44:14,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-13 19:44:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-07-13 19:44:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-13 19:44:14,772 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-13 19:44:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:14,772 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-13 19:44:14,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-13 19:44:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:14,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:14,773 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:14,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4000,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,973 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 448 times [2021-07-13 19:44:14,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:14,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996262215] [2021-07-13 19:44:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996262215] [2021-07-13 19:44:15,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996262215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703298889] [2021-07-13 19:44:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:15,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703298889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:15,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:15,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28635647] [2021-07-13 19:44:15,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:15,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:15,275 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:15,732 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-07-13 19:44:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:15,733 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:44:15,733 INFO L226 Difference]: Without dead ends: 592 [2021-07-13 19:44:15,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-13 19:44:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-07-13 19:44:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.983277591973244) internal successors, (892), 299 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-07-13 19:44:15,738 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-07-13 19:44:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:15,738 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-07-13 19:44:15,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-07-13 19:44:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:15,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:15,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:15,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-13 19:44:15,939 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:15,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 449 times [2021-07-13 19:44:15,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:15,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557603571] [2021-07-13 19:44:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:15,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557603571] [2021-07-13 19:44:15,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557603571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743634997] [2021-07-13 19:44:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:16,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:16,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743634997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:16,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651054119] [2021-07-13 19:44:16,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:16,248 INFO L87 Difference]: Start difference. First operand 300 states and 892 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:16,631 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-07-13 19:44:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:16,632 INFO L225 Difference]: With dead ends: 562 [2021-07-13 19:44:16,632 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 19:44:16,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 19:44:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-07-13 19:44:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-07-13 19:44:16,639 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-07-13 19:44:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:16,639 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-07-13 19:44:16,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-07-13 19:44:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:16,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:16,640 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:16,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-13 19:44:16,840 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 450 times [2021-07-13 19:44:16,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:16,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690199792] [2021-07-13 19:44:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690199792] [2021-07-13 19:44:16,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690199792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19400067] [2021-07-13 19:44:16,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:16,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:16,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19400067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:17,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:17,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581895736] [2021-07-13 19:44:17,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:17,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:17,120 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:17,442 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-07-13 19:44:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:17,443 INFO L225 Difference]: With dead ends: 594 [2021-07-13 19:44:17,443 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:44:17,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:44:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-07-13 19:44:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-07-13 19:44:17,447 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-07-13 19:44:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:17,447 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-07-13 19:44:17,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-07-13 19:44:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:17,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:17,448 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:17,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-07-13 19:44:17,648 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 451 times [2021-07-13 19:44:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:17,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715729905] [2021-07-13 19:44:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715729905] [2021-07-13 19:44:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715729905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184123101] [2021-07-13 19:44:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:17,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:17,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184123101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:17,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140679019] [2021-07-13 19:44:17,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:17,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:17,999 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:18,401 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-07-13 19:44:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:18,403 INFO L225 Difference]: With dead ends: 604 [2021-07-13 19:44:18,403 INFO L226 Difference]: Without dead ends: 604 [2021-07-13 19:44:18,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-13 19:44:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-07-13 19:44:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.99) internal successors, (897), 300 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-07-13 19:44:18,407 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-07-13 19:44:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:18,407 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-07-13 19:44:18,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-07-13 19:44:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:18,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:18,408 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:18,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,608 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 452 times [2021-07-13 19:44:18,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:18,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604644123] [2021-07-13 19:44:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:18,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604644123] [2021-07-13 19:44:18,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604644123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273356608] [2021-07-13 19:44:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273356608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:18,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:18,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721007338] [2021-07-13 19:44:18,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:18,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:18,934 INFO L87 Difference]: Start difference. First operand 301 states and 897 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:19,359 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-07-13 19:44:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:19,361 INFO L225 Difference]: With dead ends: 610 [2021-07-13 19:44:19,361 INFO L226 Difference]: Without dead ends: 604 [2021-07-13 19:44:19,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-13 19:44:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-07-13 19:44:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-07-13 19:44:19,365 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-07-13 19:44:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:19,365 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-07-13 19:44:19,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-07-13 19:44:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:19,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:19,366 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:19,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,566 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 453 times [2021-07-13 19:44:19,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:19,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690088504] [2021-07-13 19:44:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:19,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690088504] [2021-07-13 19:44:19,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690088504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226302422] [2021-07-13 19:44:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226302422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:19,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825592521] [2021-07-13 19:44:19,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:19,889 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:20,237 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-07-13 19:44:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:20,238 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:44:20,238 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:44:20,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:44:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-07-13 19:44:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-07-13 19:44:20,242 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-07-13 19:44:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-07-13 19:44:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-07-13 19:44:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:20,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:20,243 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:20,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-13 19:44:20,443 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 454 times [2021-07-13 19:44:20,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:20,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111375876] [2021-07-13 19:44:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111375876] [2021-07-13 19:44:20,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111375876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218390751] [2021-07-13 19:44:20,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:20,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:20,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218390751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046301898] [2021-07-13 19:44:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:20,781 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:21,343 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-07-13 19:44:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:21,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:21,344 INFO L225 Difference]: With dead ends: 682 [2021-07-13 19:44:21,344 INFO L226 Difference]: Without dead ends: 682 [2021-07-13 19:44:21,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-13 19:44:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-07-13 19:44:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0165562913907285) internal successors, (911), 302 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-07-13 19:44:21,349 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-07-13 19:44:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:21,349 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-07-13 19:44:21,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-07-13 19:44:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:21,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:21,349 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:21,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-13 19:44:21,550 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 455 times [2021-07-13 19:44:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:21,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290448706] [2021-07-13 19:44:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290448706] [2021-07-13 19:44:21,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290448706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998987212] [2021-07-13 19:44:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998987212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:21,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233003849] [2021-07-13 19:44:21,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:21,887 INFO L87 Difference]: Start difference. First operand 303 states and 911 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:22,591 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-07-13 19:44:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:22,592 INFO L225 Difference]: With dead ends: 688 [2021-07-13 19:44:22,592 INFO L226 Difference]: Without dead ends: 682 [2021-07-13 19:44:22,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-13 19:44:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-07-13 19:44:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-07-13 19:44:22,596 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-07-13 19:44:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:22,596 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-07-13 19:44:22,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-07-13 19:44:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:22,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:22,597 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:22,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-07-13 19:44:22,797 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 456 times [2021-07-13 19:44:22,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:22,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921881528] [2021-07-13 19:44:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:22,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921881528] [2021-07-13 19:44:22,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921881528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945861302] [2021-07-13 19:44:22,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:22,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945861302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:23,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827911679] [2021-07-13 19:44:23,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:23,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:23,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:23,151 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:23,508 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-07-13 19:44:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:23,509 INFO L225 Difference]: With dead ends: 650 [2021-07-13 19:44:23,509 INFO L226 Difference]: Without dead ends: 650 [2021-07-13 19:44:23,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-13 19:44:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-07-13 19:44:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0033557046979866) internal successors, (895), 298 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-07-13 19:44:23,514 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-07-13 19:44:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:23,514 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-07-13 19:44:23,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-07-13 19:44:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:23,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:23,514 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:23,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,729 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 457 times [2021-07-13 19:44:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:23,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876272696] [2021-07-13 19:44:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876272696] [2021-07-13 19:44:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876272696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113778635] [2021-07-13 19:44:23,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113778635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:24,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86258437] [2021-07-13 19:44:24,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:24,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:24,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:24,050 INFO L87 Difference]: Start difference. First operand 299 states and 895 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:24,386 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-07-13 19:44:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:24,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:24,387 INFO L225 Difference]: With dead ends: 613 [2021-07-13 19:44:24,387 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 19:44:24,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 19:44:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-07-13 19:44:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.983050847457627) internal successors, (880), 295 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-07-13 19:44:24,392 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-07-13 19:44:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:24,392 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-07-13 19:44:24,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-07-13 19:44:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:24,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:24,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:24,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,593 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 458 times [2021-07-13 19:44:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:24,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173377771] [2021-07-13 19:44:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:24,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173377771] [2021-07-13 19:44:24,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173377771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981032742] [2021-07-13 19:44:24,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:24,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981032742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:24,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:24,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482371785] [2021-07-13 19:44:24,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:24,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:24,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:24,924 INFO L87 Difference]: Start difference. First operand 296 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:25,510 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-07-13 19:44:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:25,511 INFO L225 Difference]: With dead ends: 650 [2021-07-13 19:44:25,511 INFO L226 Difference]: Without dead ends: 644 [2021-07-13 19:44:25,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-13 19:44:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-07-13 19:44:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9737704918032786) internal successors, (907), 305 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-07-13 19:44:25,516 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-07-13 19:44:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:25,516 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-07-13 19:44:25,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-07-13 19:44:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:25,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:25,517 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:25,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-07-13 19:44:25,717 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 459 times [2021-07-13 19:44:25,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:25,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507395310] [2021-07-13 19:44:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:25,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507395310] [2021-07-13 19:44:25,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507395310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957797558] [2021-07-13 19:44:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957797558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:26,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013662838] [2021-07-13 19:44:26,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:26,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:26,092 INFO L87 Difference]: Start difference. First operand 306 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:26,644 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-07-13 19:44:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:26,645 INFO L225 Difference]: With dead ends: 627 [2021-07-13 19:44:26,645 INFO L226 Difference]: Without dead ends: 627 [2021-07-13 19:44:26,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-13 19:44:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-07-13 19:44:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-07-13 19:44:26,650 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-07-13 19:44:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:26,650 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-07-13 19:44:26,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-07-13 19:44:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:26,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:26,650 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:26,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,851 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 460 times [2021-07-13 19:44:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:26,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140366009] [2021-07-13 19:44:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140366009] [2021-07-13 19:44:26,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140366009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961262787] [2021-07-13 19:44:26,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:27,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961262787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:27,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936227744] [2021-07-13 19:44:27,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:27,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:27,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:27,234 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:27,619 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-07-13 19:44:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:27,620 INFO L225 Difference]: With dead ends: 567 [2021-07-13 19:44:27,620 INFO L226 Difference]: Without dead ends: 555 [2021-07-13 19:44:27,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-13 19:44:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-07-13 19:44:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.972972972972973) internal successors, (880), 296 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-07-13 19:44:27,628 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-07-13 19:44:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:27,628 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-07-13 19:44:27,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-07-13 19:44:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:27,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:27,628 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:27,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,829 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 461 times [2021-07-13 19:44:27,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:27,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262284200] [2021-07-13 19:44:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262284200] [2021-07-13 19:44:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262284200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712007406] [2021-07-13 19:44:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712007406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:28,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:28,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326986018] [2021-07-13 19:44:28,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:28,160 INFO L87 Difference]: Start difference. First operand 297 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:28,672 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-07-13 19:44:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:28,674 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:44:28,674 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:44:28,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:44:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-07-13 19:44:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-13 19:44:28,678 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-13 19:44:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:28,678 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-13 19:44:28,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-13 19:44:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:28,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:28,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:28,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4127 [2021-07-13 19:44:28,879 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 462 times [2021-07-13 19:44:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:28,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580578797] [2021-07-13 19:44:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580578797] [2021-07-13 19:44:28,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580578797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084089814] [2021-07-13 19:44:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084089814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:29,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:29,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169837423] [2021-07-13 19:44:29,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:29,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:29,209 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:29,505 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-07-13 19:44:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:29,506 INFO L225 Difference]: With dead ends: 563 [2021-07-13 19:44:29,506 INFO L226 Difference]: Without dead ends: 563 [2021-07-13 19:44:29,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-13 19:44:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-07-13 19:44:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-07-13 19:44:29,511 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-07-13 19:44:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:29,511 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-07-13 19:44:29,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-07-13 19:44:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:29,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:29,511 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:29,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-07-13 19:44:29,712 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 463 times [2021-07-13 19:44:29,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:29,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988589217] [2021-07-13 19:44:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:29,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988589217] [2021-07-13 19:44:29,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988589217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687067212] [2021-07-13 19:44:29,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:29,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687067212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:29,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167664283] [2021-07-13 19:44:29,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:29,996 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:30,350 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-07-13 19:44:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:30,351 INFO L225 Difference]: With dead ends: 651 [2021-07-13 19:44:30,351 INFO L226 Difference]: Without dead ends: 633 [2021-07-13 19:44:30,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-13 19:44:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-07-13 19:44:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9661016949152543) internal successors, (875), 295 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-07-13 19:44:30,356 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-07-13 19:44:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:30,356 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-07-13 19:44:30,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-07-13 19:44:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:30,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:30,356 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:30,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-07-13 19:44:30,557 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 464 times [2021-07-13 19:44:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:30,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248712827] [2021-07-13 19:44:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248712827] [2021-07-13 19:44:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248712827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450126557] [2021-07-13 19:44:30,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:30,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450126557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:30,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:30,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290234054] [2021-07-13 19:44:30,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:30,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:30,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:30,873 INFO L87 Difference]: Start difference. First operand 296 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:31,289 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-07-13 19:44:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:31,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:31,290 INFO L225 Difference]: With dead ends: 612 [2021-07-13 19:44:31,290 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:44:31,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:44:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-07-13 19:44:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.962962962962963) internal successors, (880), 297 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-07-13 19:44:31,295 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-07-13 19:44:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:31,295 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-07-13 19:44:31,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-07-13 19:44:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:31,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:31,295 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:31,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,496 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 465 times [2021-07-13 19:44:31,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:31,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513444067] [2021-07-13 19:44:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513444067] [2021-07-13 19:44:31,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513444067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533289833] [2021-07-13 19:44:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:31,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533289833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:31,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181666645] [2021-07-13 19:44:31,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:31,814 INFO L87 Difference]: Start difference. First operand 298 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:32,399 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-07-13 19:44:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:32,400 INFO L225 Difference]: With dead ends: 637 [2021-07-13 19:44:32,400 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:44:32,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:44:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-07-13 19:44:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-07-13 19:44:32,405 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-07-13 19:44:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:32,405 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-07-13 19:44:32,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-07-13 19:44:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:32,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:32,405 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:32,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-13 19:44:32,605 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 466 times [2021-07-13 19:44:32,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:32,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931067392] [2021-07-13 19:44:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931067392] [2021-07-13 19:44:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931067392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578860175] [2021-07-13 19:44:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:32,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578860175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:32,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:32,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003785727] [2021-07-13 19:44:32,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:32,932 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:33,310 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-07-13 19:44:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:33,311 INFO L225 Difference]: With dead ends: 608 [2021-07-13 19:44:33,311 INFO L226 Difference]: Without dead ends: 608 [2021-07-13 19:44:33,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-13 19:44:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-07-13 19:44:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-13 19:44:33,316 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-13 19:44:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:33,316 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-13 19:44:33,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-13 19:44:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:33,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:33,316 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,517 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 467 times [2021-07-13 19:44:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968401389] [2021-07-13 19:44:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:33,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968401389] [2021-07-13 19:44:33,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968401389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207937518] [2021-07-13 19:44:33,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:33,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207937518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170152296] [2021-07-13 19:44:33,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:33,881 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:34,177 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-07-13 19:44:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:34,178 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:44:34,178 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:44:34,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:44:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-07-13 19:44:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-07-13 19:44:34,182 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-07-13 19:44:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-07-13 19:44:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-07-13 19:44:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:34,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:34,183 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:34,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,383 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 468 times [2021-07-13 19:44:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:34,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565822288] [2021-07-13 19:44:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565822288] [2021-07-13 19:44:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565822288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066460412] [2021-07-13 19:44:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066460412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:34,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:34,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124799214] [2021-07-13 19:44:34,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:34,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:34,718 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:35,019 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-07-13 19:44:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:35,020 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:44:35,020 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:44:35,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:44:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-07-13 19:44:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-13 19:44:35,024 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-13 19:44:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:35,024 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-13 19:44:35,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-13 19:44:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:35,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:35,024 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:35,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-07-13 19:44:35,225 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 469 times [2021-07-13 19:44:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004712973] [2021-07-13 19:44:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004712973] [2021-07-13 19:44:35,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004712973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358636418] [2021-07-13 19:44:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358636418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:35,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:35,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814816629] [2021-07-13 19:44:35,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:35,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:35,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:35,558 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:35,817 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-07-13 19:44:35,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:35,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:35,818 INFO L225 Difference]: With dead ends: 459 [2021-07-13 19:44:35,818 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:44:35,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:44:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-07-13 19:44:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-13 19:44:35,822 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-13 19:44:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:35,822 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-13 19:44:35,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-13 19:44:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:35,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:35,822 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:36,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4199 [2021-07-13 19:44:36,023 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 470 times [2021-07-13 19:44:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:36,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043392676] [2021-07-13 19:44:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:36,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043392676] [2021-07-13 19:44:36,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043392676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317752457] [2021-07-13 19:44:36,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317752457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:36,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:36,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328257923] [2021-07-13 19:44:36,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:36,340 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:36,644 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-07-13 19:44:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:36,645 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:44:36,645 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:44:36,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:44:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-07-13 19:44:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-13 19:44:36,650 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-13 19:44:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:36,650 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-13 19:44:36,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-13 19:44:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:36,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:36,651 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:36,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4206,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:36,851 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 471 times [2021-07-13 19:44:36,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:36,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448993964] [2021-07-13 19:44:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448993964] [2021-07-13 19:44:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448993964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78917039] [2021-07-13 19:44:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:37,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:37,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:37,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78917039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:37,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:37,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151367057] [2021-07-13 19:44:37,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:37,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:37,174 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:37,551 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-07-13 19:44:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:37,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:37,552 INFO L225 Difference]: With dead ends: 582 [2021-07-13 19:44:37,552 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:44:37,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:44:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-07-13 19:44:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-07-13 19:44:37,556 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-07-13 19:44:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:37,556 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-07-13 19:44:37,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-07-13 19:44:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:37,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:37,557 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:37,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4218 [2021-07-13 19:44:37,757 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:37,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:37,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 472 times [2021-07-13 19:44:37,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:37,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113324055] [2021-07-13 19:44:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:37,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113324055] [2021-07-13 19:44:37,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113324055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734942896] [2021-07-13 19:44:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:37,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734942896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:38,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:38,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52823883] [2021-07-13 19:44:38,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:38,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:38,117 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:38,363 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-07-13 19:44:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:38,364 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:44:38,365 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:44:38,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:44:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-07-13 19:44:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-07-13 19:44:38,369 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-07-13 19:44:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:38,369 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-07-13 19:44:38,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-07-13 19:44:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:38,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:38,369 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:38,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,570 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 473 times [2021-07-13 19:44:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:38,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074589781] [2021-07-13 19:44:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:38,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074589781] [2021-07-13 19:44:38,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074589781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539286915] [2021-07-13 19:44:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539286915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:38,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:38,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853930758] [2021-07-13 19:44:38,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:38,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:38,889 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:39,082 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-07-13 19:44:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:39,083 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:44:39,083 INFO L226 Difference]: Without dead ends: 507 [2021-07-13 19:44:39,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-13 19:44:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-07-13 19:44:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-07-13 19:44:39,087 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-07-13 19:44:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:39,087 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-07-13 19:44:39,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-07-13 19:44:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:39,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:39,087 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:39,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,288 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 474 times [2021-07-13 19:44:39,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:39,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703572193] [2021-07-13 19:44:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703572193] [2021-07-13 19:44:39,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703572193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964879248] [2021-07-13 19:44:39,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:39,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:39,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964879248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:39,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411889223] [2021-07-13 19:44:39,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:39,638 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:40,064 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-07-13 19:44:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:40,065 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:44:40,065 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 19:44:40,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 19:44:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-07-13 19:44:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-07-13 19:44:40,069 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-07-13 19:44:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:40,069 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-07-13 19:44:40,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-07-13 19:44:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:40,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:40,070 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4242 [2021-07-13 19:44:40,270 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 475 times [2021-07-13 19:44:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:40,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330079697] [2021-07-13 19:44:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330079697] [2021-07-13 19:44:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330079697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235795373] [2021-07-13 19:44:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235795373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:40,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:40,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027229422] [2021-07-13 19:44:40,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:40,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:40,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:40,586 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:40,931 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-07-13 19:44:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:40,932 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:44:40,932 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:44:40,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:44:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-07-13 19:44:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-13 19:44:40,936 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-13 19:44:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:40,936 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-13 19:44:40,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-13 19:44:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:40,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:40,937 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4254 [2021-07-13 19:44:41,137 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 476 times [2021-07-13 19:44:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930834016] [2021-07-13 19:44:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:41,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930834016] [2021-07-13 19:44:41,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930834016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490843911] [2021-07-13 19:44:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490843911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:41,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:41,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519578949] [2021-07-13 19:44:41,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:41,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:41,458 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:41,748 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-07-13 19:44:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:41,748 INFO L225 Difference]: With dead ends: 461 [2021-07-13 19:44:41,748 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:44:41,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:44:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-07-13 19:44:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-13 19:44:41,752 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-07-13 19:44:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:41,752 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-13 19:44:41,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-13 19:44:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:41,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:41,753 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-07-13 19:44:41,953 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 477 times [2021-07-13 19:44:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760323040] [2021-07-13 19:44:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:42,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760323040] [2021-07-13 19:44:42,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760323040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010114927] [2021-07-13 19:44:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010114927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:42,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753895472] [2021-07-13 19:44:42,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:42,306 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:42,642 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-07-13 19:44:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:42,643 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:44:42,643 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:44:42,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:44:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-07-13 19:44:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-07-13 19:44:42,647 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-07-13 19:44:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:42,647 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-07-13 19:44:42,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-07-13 19:44:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:42,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:42,648 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-07-13 19:44:42,848 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 478 times [2021-07-13 19:44:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:42,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104118052] [2021-07-13 19:44:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104118052] [2021-07-13 19:44:42,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104118052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388292770] [2021-07-13 19:44:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:43,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:43,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388292770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:43,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:43,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958773226] [2021-07-13 19:44:43,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:43,183 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:43,385 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-07-13 19:44:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:43,386 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:44:43,386 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:44:43,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:44:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-07-13 19:44:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:44:43,390 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-13 19:44:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:43,390 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:44:43,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:44:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:43,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:43,391 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:43,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,591 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 479 times [2021-07-13 19:44:43,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:43,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586221709] [2021-07-13 19:44:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:43,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586221709] [2021-07-13 19:44:43,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586221709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597784255] [2021-07-13 19:44:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:43,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597784255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:43,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:43,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828605091] [2021-07-13 19:44:43,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:43,893 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:44,155 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-07-13 19:44:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:44,156 INFO L225 Difference]: With dead ends: 586 [2021-07-13 19:44:44,156 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:44:44,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:44:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-07-13 19:44:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-07-13 19:44:44,161 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-07-13 19:44:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:44,161 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-07-13 19:44:44,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-07-13 19:44:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:44,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:44,161 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:44,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-07-13 19:44:44,362 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 480 times [2021-07-13 19:44:44,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:44,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639772139] [2021-07-13 19:44:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639772139] [2021-07-13 19:44:44,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639772139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169964109] [2021-07-13 19:44:44,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:44,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:44,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169964109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:44,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228092287] [2021-07-13 19:44:44,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:44,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:44,681 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:44,882 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-07-13 19:44:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:44,883 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:44:44,883 INFO L226 Difference]: Without dead ends: 534 [2021-07-13 19:44:44,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-13 19:44:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-07-13 19:44:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-13 19:44:44,887 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-13 19:44:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:44,888 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-13 19:44:44,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-13 19:44:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:44,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:44,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:45,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,088 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 481 times [2021-07-13 19:44:45,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:45,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396890652] [2021-07-13 19:44:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:45,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396890652] [2021-07-13 19:44:45,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396890652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141177882] [2021-07-13 19:44:45,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141177882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:45,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190204379] [2021-07-13 19:44:45,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:45,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:45,405 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:45,606 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-07-13 19:44:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:45,607 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:44:45,607 INFO L226 Difference]: Without dead ends: 592 [2021-07-13 19:44:45,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-13 19:44:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-07-13 19:44:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-07-13 19:44:45,611 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-07-13 19:44:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:45,611 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-07-13 19:44:45,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-07-13 19:44:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:45,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:45,612 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:45,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,813 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 482 times [2021-07-13 19:44:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463396712] [2021-07-13 19:44:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463396712] [2021-07-13 19:44:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463396712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562441726] [2021-07-13 19:44:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562441726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:46,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857852551] [2021-07-13 19:44:46,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:46,110 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:46,302 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-07-13 19:44:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:46,304 INFO L225 Difference]: With dead ends: 555 [2021-07-13 19:44:46,304 INFO L226 Difference]: Without dead ends: 555 [2021-07-13 19:44:46,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-13 19:44:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-07-13 19:44:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-13 19:44:46,308 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-13 19:44:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:46,308 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-13 19:44:46,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-13 19:44:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:46,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:46,309 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:46,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,525 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 483 times [2021-07-13 19:44:46,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:46,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613192472] [2021-07-13 19:44:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613192472] [2021-07-13 19:44:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613192472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227254018] [2021-07-13 19:44:46,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:46,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:46,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227254018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785862828] [2021-07-13 19:44:46,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:46,833 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:47,007 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-07-13 19:44:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:47,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:47,008 INFO L225 Difference]: With dead ends: 580 [2021-07-13 19:44:47,008 INFO L226 Difference]: Without dead ends: 574 [2021-07-13 19:44:47,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-13 19:44:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-07-13 19:44:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-13 19:44:47,012 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-13 19:44:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:47,013 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-13 19:44:47,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-13 19:44:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:47,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:47,013 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:47,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-07-13 19:44:47,216 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 484 times [2021-07-13 19:44:47,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:47,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499289763] [2021-07-13 19:44:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:47,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499289763] [2021-07-13 19:44:47,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499289763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183392885] [2021-07-13 19:44:47,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:47,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183392885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:47,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351369385] [2021-07-13 19:44:47,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:47,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:47,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:47,513 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:47,785 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-07-13 19:44:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:47,786 INFO L225 Difference]: With dead ends: 586 [2021-07-13 19:44:47,786 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:44:47,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:44:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-07-13 19:44:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-07-13 19:44:47,790 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-07-13 19:44:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:47,790 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-07-13 19:44:47,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-07-13 19:44:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:47,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:47,791 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:47,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-07-13 19:44:47,991 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 485 times [2021-07-13 19:44:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:47,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193421501] [2021-07-13 19:44:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193421501] [2021-07-13 19:44:48,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193421501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440084482] [2021-07-13 19:44:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:48,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:48,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440084482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:48,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:48,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93304749] [2021-07-13 19:44:48,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:48,360 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:48,564 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-07-13 19:44:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:48,565 INFO L225 Difference]: With dead ends: 516 [2021-07-13 19:44:48,565 INFO L226 Difference]: Without dead ends: 516 [2021-07-13 19:44:48,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-13 19:44:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-07-13 19:44:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-07-13 19:44:48,574 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-07-13 19:44:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:48,574 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-07-13 19:44:48,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-07-13 19:44:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:48,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:48,575 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:48,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-07-13 19:44:48,775 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 486 times [2021-07-13 19:44:48,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:48,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446056400] [2021-07-13 19:44:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:48,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446056400] [2021-07-13 19:44:48,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446056400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176407933] [2021-07-13 19:44:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:48,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:48,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176407933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:49,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429281728] [2021-07-13 19:44:49,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:49,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:49,102 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:49,369 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-07-13 19:44:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:49,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:49,370 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:44:49,370 INFO L226 Difference]: Without dead ends: 504 [2021-07-13 19:44:49,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-13 19:44:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-07-13 19:44:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-13 19:44:49,375 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-13 19:44:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:49,375 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-13 19:44:49,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-13 19:44:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:49,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:49,375 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-07-13 19:44:49,576 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 487 times [2021-07-13 19:44:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788480049] [2021-07-13 19:44:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:49,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788480049] [2021-07-13 19:44:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788480049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851759110] [2021-07-13 19:44:49,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851759110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:49,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:49,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415494086] [2021-07-13 19:44:49,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:49,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:49,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:49,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:49,904 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:50,111 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-07-13 19:44:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:50,112 INFO L225 Difference]: With dead ends: 459 [2021-07-13 19:44:50,112 INFO L226 Difference]: Without dead ends: 459 [2021-07-13 19:44:50,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-13 19:44:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-07-13 19:44:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-07-13 19:44:50,117 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-07-13 19:44:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:50,118 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-07-13 19:44:50,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-07-13 19:44:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:50,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:50,118 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:50,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-07-13 19:44:50,319 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 488 times [2021-07-13 19:44:50,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:50,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159283013] [2021-07-13 19:44:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159283013] [2021-07-13 19:44:50,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159283013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680755803] [2021-07-13 19:44:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680755803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:50,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001532235] [2021-07-13 19:44:50,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:50,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:50,681 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:50,903 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-07-13 19:44:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:50,904 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:44:50,904 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:44:50,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:44:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-07-13 19:44:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-07-13 19:44:50,909 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-07-13 19:44:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-07-13 19:44:50,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-07-13 19:44:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:50,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:50,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,110 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 489 times [2021-07-13 19:44:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079284091] [2021-07-13 19:44:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079284091] [2021-07-13 19:44:51,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079284091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44634679] [2021-07-13 19:44:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44634679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:51,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:51,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532341342] [2021-07-13 19:44:51,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:51,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:51,441 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:51,677 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-07-13 19:44:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:51,678 INFO L225 Difference]: With dead ends: 510 [2021-07-13 19:44:51,678 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:44:51,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:44:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-07-13 19:44:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-13 19:44:51,682 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-13 19:44:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:51,682 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-13 19:44:51,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-13 19:44:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:51,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:51,683 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-07-13 19:44:51,883 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 490 times [2021-07-13 19:44:51,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430063572] [2021-07-13 19:44:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430063572] [2021-07-13 19:44:51,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430063572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465381683] [2021-07-13 19:44:51,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:52,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465381683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:52,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:52,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130230415] [2021-07-13 19:44:52,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:52,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:52,228 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,469 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-07-13 19:44:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,470 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:44:52,470 INFO L226 Difference]: Without dead ends: 479 [2021-07-13 19:44:52,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-13 19:44:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-07-13 19:44:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:44:52,474 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-13 19:44:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,474 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:44:52,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:44:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:52,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,474 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:52,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,675 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 491 times [2021-07-13 19:44:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45881594] [2021-07-13 19:44:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45881594] [2021-07-13 19:44:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45881594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536138417] [2021-07-13 19:44:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:52,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536138417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:52,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596393822] [2021-07-13 19:44:52,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:52,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:52,989 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:53,207 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-07-13 19:44:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:53,208 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:44:53,208 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:44:53,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:44:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-07-13 19:44:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-07-13 19:44:53,213 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-07-13 19:44:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:53,214 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-07-13 19:44:53,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-07-13 19:44:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:53,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:53,214 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:53,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,415 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 492 times [2021-07-13 19:44:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:53,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383508867] [2021-07-13 19:44:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:53,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383508867] [2021-07-13 19:44:53,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383508867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455955113] [2021-07-13 19:44:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455955113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:53,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375394513] [2021-07-13 19:44:53,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:53,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:53,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:53,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:53,725 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:53,967 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-07-13 19:44:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:53,968 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:44:53,968 INFO L226 Difference]: Without dead ends: 470 [2021-07-13 19:44:53,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-13 19:44:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-07-13 19:44:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-07-13 19:44:53,972 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-07-13 19:44:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:53,972 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-07-13 19:44:53,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-07-13 19:44:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:53,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:53,973 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:54,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,173 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 493 times [2021-07-13 19:44:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:54,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141452905] [2021-07-13 19:44:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141452905] [2021-07-13 19:44:54,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141452905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314482512] [2021-07-13 19:44:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314482512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444130930] [2021-07-13 19:44:54,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:54,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:54,484 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:54,674 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-07-13 19:44:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:54,675 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:44:54,675 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:44:54,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:44:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-07-13 19:44:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-07-13 19:44:54,678 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-07-13 19:44:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:54,678 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-07-13 19:44:54,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-07-13 19:44:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:54,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:54,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:54,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,879 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 494 times [2021-07-13 19:44:54,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:54,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691838858] [2021-07-13 19:44:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691838858] [2021-07-13 19:44:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691838858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941430013] [2021-07-13 19:44:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941430013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:55,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395399471] [2021-07-13 19:44:55,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:55,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:55,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:55,168 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:55,345 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-07-13 19:44:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:55,346 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:44:55,346 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:44:55,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:44:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-07-13 19:44:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-07-13 19:44:55,350 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-07-13 19:44:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:55,350 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-07-13 19:44:55,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-07-13 19:44:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:55,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:55,350 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:55,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,551 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 495 times [2021-07-13 19:44:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:55,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393543044] [2021-07-13 19:44:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:55,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393543044] [2021-07-13 19:44:55,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393543044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651190011] [2021-07-13 19:44:55,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651190011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:55,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877142095] [2021-07-13 19:44:55,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:55,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:55,847 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:56,084 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-07-13 19:44:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:56,085 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:44:56,085 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:44:56,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:44:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-07-13 19:44:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-07-13 19:44:56,089 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-07-13 19:44:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:56,089 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-07-13 19:44:56,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-07-13 19:44:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:56,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:56,090 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-07-13 19:44:56,290 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 496 times [2021-07-13 19:44:56,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870553835] [2021-07-13 19:44:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870553835] [2021-07-13 19:44:56,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870553835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020563900] [2021-07-13 19:44:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020563900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:56,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167527575] [2021-07-13 19:44:56,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:56,582 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:56,745 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-07-13 19:44:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:56,746 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:44:56,746 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:44:56,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:44:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-07-13 19:44:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-13 19:44:56,750 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-13 19:44:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:56,750 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-13 19:44:56,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-13 19:44:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:56,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:56,750 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,951 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 497 times [2021-07-13 19:44:56,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955442009] [2021-07-13 19:44:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955442009] [2021-07-13 19:44:57,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955442009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544687890] [2021-07-13 19:44:57,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:57,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:57,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544687890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:57,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:57,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320562901] [2021-07-13 19:44:57,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:57,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:57,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:57,226 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,509 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-07-13 19:44:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,510 INFO L225 Difference]: With dead ends: 529 [2021-07-13 19:44:57,510 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:44:57,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:44:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-07-13 19:44:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-13 19:44:57,514 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-13 19:44:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,514 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-13 19:44:57,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-13 19:44:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:57,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,515 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:57,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4438 [2021-07-13 19:44:57,715 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 498 times [2021-07-13 19:44:57,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:57,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421953949] [2021-07-13 19:44:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421953949] [2021-07-13 19:44:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421953949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128412486] [2021-07-13 19:44:57,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:57,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128412486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:58,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:58,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340427303] [2021-07-13 19:44:58,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:58,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:58,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:58,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:58,020 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:58,311 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-07-13 19:44:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:58,312 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:44:58,312 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:44:58,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:44:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-07-13 19:44:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-13 19:44:58,317 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-13 19:44:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:58,317 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-13 19:44:58,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-13 19:44:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:58,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:58,317 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:58,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,518 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 499 times [2021-07-13 19:44:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:58,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205411917] [2021-07-13 19:44:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205411917] [2021-07-13 19:44:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205411917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412824357] [2021-07-13 19:44:58,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412824357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:58,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:58,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492143472] [2021-07-13 19:44:58,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:58,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:58,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:58,792 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:59,150 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-07-13 19:44:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:59,151 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:44:59,151 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:44:59,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:44:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-07-13 19:44:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-13 19:44:59,156 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-13 19:44:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:59,156 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-13 19:44:59,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-13 19:44:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:59,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:59,156 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:59,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-07-13 19:44:59,357 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 500 times [2021-07-13 19:44:59,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:59,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239988998] [2021-07-13 19:44:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239988998] [2021-07-13 19:44:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239988998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354753823] [2021-07-13 19:44:59,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:59,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354753823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:59,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:59,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496817957] [2021-07-13 19:44:59,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:59,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:59,637 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:59,884 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-07-13 19:44:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:59,885 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:44:59,885 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:44:59,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:44:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-07-13 19:44:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-07-13 19:44:59,889 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-07-13 19:44:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:59,889 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-07-13 19:44:59,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-07-13 19:44:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:59,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:59,889 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:00,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,090 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 501 times [2021-07-13 19:45:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:00,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728478074] [2021-07-13 19:45:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728478074] [2021-07-13 19:45:00,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728478074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605968572] [2021-07-13 19:45:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605968572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:00,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013520648] [2021-07-13 19:45:00,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:00,343 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:00,547 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-07-13 19:45:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:00,547 INFO L225 Difference]: With dead ends: 470 [2021-07-13 19:45:00,547 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:45:00,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:45:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-07-13 19:45:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-13 19:45:00,551 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-13 19:45:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:00,551 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-13 19:45:00,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-13 19:45:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:00,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:00,551 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:00,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4461 [2021-07-13 19:45:00,752 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 502 times [2021-07-13 19:45:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:00,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521828355] [2021-07-13 19:45:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521828355] [2021-07-13 19:45:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521828355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532663739] [2021-07-13 19:45:00,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532663739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:01,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309096524] [2021-07-13 19:45:01,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:01,006 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:01,235 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-07-13 19:45:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:01,236 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:45:01,236 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:45:01,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:45:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-07-13 19:45:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-13 19:45:01,240 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-13 19:45:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:01,241 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-13 19:45:01,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-13 19:45:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:01,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:01,241 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:01,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4466,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,442 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 503 times [2021-07-13 19:45:01,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:01,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12907919] [2021-07-13 19:45:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:01,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12907919] [2021-07-13 19:45:01,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12907919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269614039] [2021-07-13 19:45:01,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269614039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:01,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:01,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975803205] [2021-07-13 19:45:01,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:01,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:01,711 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:01,896 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-07-13 19:45:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:01,897 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:45:01,897 INFO L226 Difference]: Without dead ends: 466 [2021-07-13 19:45:01,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-13 19:45:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-07-13 19:45:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-13 19:45:01,901 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-13 19:45:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:01,901 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-13 19:45:01,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-13 19:45:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:01,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:01,902 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:02,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-07-13 19:45:02,102 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 504 times [2021-07-13 19:45:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:02,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816510897] [2021-07-13 19:45:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816510897] [2021-07-13 19:45:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816510897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167286980] [2021-07-13 19:45:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167286980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:02,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995355832] [2021-07-13 19:45:02,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:02,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:02,362 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:02,580 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-07-13 19:45:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:02,581 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:45:02,581 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 19:45:02,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 19:45:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-07-13 19:45:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-07-13 19:45:02,585 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-07-13 19:45:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:02,585 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-07-13 19:45:02,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-07-13 19:45:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:02,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:02,586 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:02,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,786 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 505 times [2021-07-13 19:45:02,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:02,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325573944] [2021-07-13 19:45:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325573944] [2021-07-13 19:45:02,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325573944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178296907] [2021-07-13 19:45:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178296907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:03,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642185366] [2021-07-13 19:45:03,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:03,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:03,055 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:03,287 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-07-13 19:45:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:03,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:03,288 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:45:03,288 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:45:03,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:45:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-07-13 19:45:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-07-13 19:45:03,292 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-07-13 19:45:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:03,292 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-07-13 19:45:03,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-07-13 19:45:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:03,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:03,292 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:03,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,493 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 506 times [2021-07-13 19:45:03,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:03,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858161059] [2021-07-13 19:45:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:03,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858161059] [2021-07-13 19:45:03,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858161059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469138966] [2021-07-13 19:45:03,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:03,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469138966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:03,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:03,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503056636] [2021-07-13 19:45:03,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:03,734 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:03,933 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-07-13 19:45:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:03,934 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:45:03,934 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:45:03,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:45:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-07-13 19:45:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-13 19:45:03,938 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-13 19:45:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:03,938 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-13 19:45:03,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-13 19:45:03,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:03,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:03,938 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:04,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:04,139 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:04,139 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 507 times [2021-07-13 19:45:04,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:04,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482325540] [2021-07-13 19:45:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:04,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482325540] [2021-07-13 19:45:04,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482325540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412710175] [2021-07-13 19:45:04,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:04,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:04,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412710175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:04,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131056137] [2021-07-13 19:45:04,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:04,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:04,492 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:04,756 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-07-13 19:45:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:04,761 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:45:04,761 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:45:04,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:45:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-07-13 19:45:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-07-13 19:45:04,765 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-07-13 19:45:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:04,765 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-07-13 19:45:04,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-07-13 19:45:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:04,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:04,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:04,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-07-13 19:45:04,966 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 508 times [2021-07-13 19:45:04,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:04,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310092410] [2021-07-13 19:45:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310092410] [2021-07-13 19:45:05,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310092410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557898811] [2021-07-13 19:45:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557898811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:05,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:05,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592417154] [2021-07-13 19:45:05,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:05,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:05,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:05,296 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:05,570 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-07-13 19:45:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:05,571 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:45:05,571 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:45:05,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:45:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-07-13 19:45:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-13 19:45:05,576 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-13 19:45:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:05,576 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-13 19:45:05,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-13 19:45:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:05,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:05,576 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:05,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,777 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 509 times [2021-07-13 19:45:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:05,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047127060] [2021-07-13 19:45:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047127060] [2021-07-13 19:45:05,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047127060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132185135] [2021-07-13 19:45:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:05,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132185135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133676443] [2021-07-13 19:45:06,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:06,125 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:06,396 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-07-13 19:45:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:06,397 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:45:06,397 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:45:06,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:45:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-07-13 19:45:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-13 19:45:06,401 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-13 19:45:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:06,401 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-13 19:45:06,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-13 19:45:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:06,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:06,401 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:06,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-07-13 19:45:06,602 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 510 times [2021-07-13 19:45:06,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:06,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896061289] [2021-07-13 19:45:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896061289] [2021-07-13 19:45:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896061289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597443659] [2021-07-13 19:45:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597443659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:06,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:06,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065927334] [2021-07-13 19:45:06,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:06,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:06,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:06,952 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:07,301 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-07-13 19:45:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:07,302 INFO L225 Difference]: With dead ends: 568 [2021-07-13 19:45:07,302 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:45:07,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:45:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-07-13 19:45:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-13 19:45:07,307 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-13 19:45:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:07,307 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-13 19:45:07,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-13 19:45:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:07,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:07,308 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:07,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4515,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,508 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 511 times [2021-07-13 19:45:07,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:07,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720678461] [2021-07-13 19:45:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720678461] [2021-07-13 19:45:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720678461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005849298] [2021-07-13 19:45:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005849298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:07,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:07,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202829850] [2021-07-13 19:45:07,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:07,883 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:08,265 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-07-13 19:45:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:08,266 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:45:08,266 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:45:08,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:45:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-07-13 19:45:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-07-13 19:45:08,271 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-07-13 19:45:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:08,271 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-07-13 19:45:08,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-07-13 19:45:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:08,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:08,271 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:08,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4525,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,472 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 512 times [2021-07-13 19:45:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:08,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811246789] [2021-07-13 19:45:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811246789] [2021-07-13 19:45:08,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811246789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833450302] [2021-07-13 19:45:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:08,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833450302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:08,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:08,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052417727] [2021-07-13 19:45:08,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:08,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:08,815 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:09,029 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-07-13 19:45:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:09,030 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:45:09,030 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:45:09,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:45:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-07-13 19:45:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-07-13 19:45:09,035 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-07-13 19:45:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:09,035 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-07-13 19:45:09,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-07-13 19:45:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:09,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:09,035 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:09,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,236 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:09,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 513 times [2021-07-13 19:45:09,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:09,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473107693] [2021-07-13 19:45:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:09,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473107693] [2021-07-13 19:45:09,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473107693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079249821] [2021-07-13 19:45:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:09,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079249821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:09,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17815561] [2021-07-13 19:45:09,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:09,561 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:09,762 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-07-13 19:45:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:09,763 INFO L225 Difference]: With dead ends: 499 [2021-07-13 19:45:09,763 INFO L226 Difference]: Without dead ends: 499 [2021-07-13 19:45:09,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-07-13 19:45:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-07-13 19:45:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-07-13 19:45:09,768 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-07-13 19:45:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:09,768 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-07-13 19:45:09,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-07-13 19:45:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:09,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:09,769 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:09,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,969 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 514 times [2021-07-13 19:45:09,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:09,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736291131] [2021-07-13 19:45:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:10,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736291131] [2021-07-13 19:45:10,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736291131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519502576] [2021-07-13 19:45:10,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:10,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519502576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112209464] [2021-07-13 19:45:10,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:10,337 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:10,745 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-07-13 19:45:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:10,746 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:45:10,746 INFO L226 Difference]: Without dead ends: 530 [2021-07-13 19:45:10,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-13 19:45:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-07-13 19:45:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-07-13 19:45:10,750 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-07-13 19:45:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:10,750 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-07-13 19:45:10,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-07-13 19:45:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:10,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:10,751 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:10,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,951 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 515 times [2021-07-13 19:45:10,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:10,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014218734] [2021-07-13 19:45:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:11,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014218734] [2021-07-13 19:45:11,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014218734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37652102] [2021-07-13 19:45:11,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37652102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:11,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:11,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826514166] [2021-07-13 19:45:11,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:11,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:11,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:11,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:11,291 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:11,599 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-07-13 19:45:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:11,600 INFO L225 Difference]: With dead ends: 513 [2021-07-13 19:45:11,600 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:45:11,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:45:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-07-13 19:45:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-13 19:45:11,604 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-13 19:45:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:11,604 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-13 19:45:11,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-13 19:45:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:11,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:11,605 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:11,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,805 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 516 times [2021-07-13 19:45:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423025672] [2021-07-13 19:45:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:11,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423025672] [2021-07-13 19:45:11,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423025672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888516057] [2021-07-13 19:45:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888516057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:12,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988224476] [2021-07-13 19:45:12,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:12,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:12,142 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:12,420 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-07-13 19:45:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:12,421 INFO L225 Difference]: With dead ends: 453 [2021-07-13 19:45:12,421 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:45:12,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:45:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-07-13 19:45:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-13 19:45:12,425 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-07-13 19:45:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:12,425 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-13 19:45:12,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-13 19:45:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:12,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:12,426 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:12,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-07-13 19:45:12,626 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 517 times [2021-07-13 19:45:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:12,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028780348] [2021-07-13 19:45:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028780348] [2021-07-13 19:45:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028780348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608386082] [2021-07-13 19:45:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608386082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:12,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:12,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38811596] [2021-07-13 19:45:12,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:12,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:12,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:12,960 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:13,306 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-07-13 19:45:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:13,307 INFO L225 Difference]: With dead ends: 478 [2021-07-13 19:45:13,308 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:45:13,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:45:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-07-13 19:45:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-07-13 19:45:13,312 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-07-13 19:45:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:13,312 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-07-13 19:45:13,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-07-13 19:45:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:13,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:13,312 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-07-13 19:45:13,513 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 518 times [2021-07-13 19:45:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707893732] [2021-07-13 19:45:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707893732] [2021-07-13 19:45:13,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707893732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909759171] [2021-07-13 19:45:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:13,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909759171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:13,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651705757] [2021-07-13 19:45:13,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:13,878 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:14,154 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-07-13 19:45:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:14,155 INFO L225 Difference]: With dead ends: 449 [2021-07-13 19:45:14,155 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:45:14,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:45:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-07-13 19:45:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:45:14,159 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-13 19:45:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:14,159 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:45:14,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:45:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:14,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:14,159 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-07-13 19:45:14,360 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 519 times [2021-07-13 19:45:14,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056789802] [2021-07-13 19:45:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:14,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056789802] [2021-07-13 19:45:14,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056789802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15683460] [2021-07-13 19:45:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:14,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15683460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983806694] [2021-07-13 19:45:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:14,700 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:15,009 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-07-13 19:45:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:15,010 INFO L225 Difference]: With dead ends: 578 [2021-07-13 19:45:15,010 INFO L226 Difference]: Without dead ends: 578 [2021-07-13 19:45:15,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-13 19:45:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-07-13 19:45:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-07-13 19:45:15,015 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-07-13 19:45:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:15,015 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-07-13 19:45:15,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-07-13 19:45:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:15,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:15,015 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:15,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4600,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,216 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 520 times [2021-07-13 19:45:15,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:15,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228670587] [2021-07-13 19:45:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:15,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228670587] [2021-07-13 19:45:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228670587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116533102] [2021-07-13 19:45:15,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116533102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:15,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:15,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364405549] [2021-07-13 19:45:15,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:15,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:15,528 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:15,752 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-07-13 19:45:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:15,753 INFO L225 Difference]: With dead ends: 532 [2021-07-13 19:45:15,753 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 19:45:15,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 19:45:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-07-13 19:45:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-13 19:45:15,762 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-13 19:45:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:15,762 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-13 19:45:15,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-13 19:45:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:15,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:15,763 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:15,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4609 [2021-07-13 19:45:15,963 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 521 times [2021-07-13 19:45:15,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:15,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721006833] [2021-07-13 19:45:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721006833] [2021-07-13 19:45:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721006833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603942367] [2021-07-13 19:45:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603942367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:16,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:16,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380966893] [2021-07-13 19:45:16,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:16,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:16,315 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:16,567 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-07-13 19:45:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:16,568 INFO L225 Difference]: With dead ends: 584 [2021-07-13 19:45:16,568 INFO L226 Difference]: Without dead ends: 584 [2021-07-13 19:45:16,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-13 19:45:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-07-13 19:45:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-07-13 19:45:16,573 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-07-13 19:45:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:16,573 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-07-13 19:45:16,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-07-13 19:45:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:16,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:16,574 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:16,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4619,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,774 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 522 times [2021-07-13 19:45:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:16,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527437968] [2021-07-13 19:45:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:16,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527437968] [2021-07-13 19:45:16,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527437968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381544633] [2021-07-13 19:45:16,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:16,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381544633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:17,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:17,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553992831] [2021-07-13 19:45:17,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:17,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:17,127 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:17,313 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-07-13 19:45:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:17,314 INFO L225 Difference]: With dead ends: 547 [2021-07-13 19:45:17,314 INFO L226 Difference]: Without dead ends: 547 [2021-07-13 19:45:17,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-13 19:45:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-07-13 19:45:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-13 19:45:17,319 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-13 19:45:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:17,319 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-13 19:45:17,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-13 19:45:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:17,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:17,319 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:17,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,520 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 523 times [2021-07-13 19:45:17,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:17,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788235476] [2021-07-13 19:45:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788235476] [2021-07-13 19:45:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788235476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411553578] [2021-07-13 19:45:17,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411553578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:17,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:17,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766995897] [2021-07-13 19:45:17,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:17,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:17,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:17,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:17,832 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:18,052 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-07-13 19:45:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:18,053 INFO L225 Difference]: With dead ends: 572 [2021-07-13 19:45:18,053 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:45:18,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:45:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-07-13 19:45:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-13 19:45:18,059 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-13 19:45:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:18,059 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-13 19:45:18,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-13 19:45:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:18,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:18,060 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:18,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-07-13 19:45:18,260 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 524 times [2021-07-13 19:45:18,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:18,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489851723] [2021-07-13 19:45:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:18,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489851723] [2021-07-13 19:45:18,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489851723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081876013] [2021-07-13 19:45:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:18,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081876013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237913006] [2021-07-13 19:45:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:18,609 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:18,888 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-07-13 19:45:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:18,889 INFO L225 Difference]: With dead ends: 578 [2021-07-13 19:45:18,889 INFO L226 Difference]: Without dead ends: 578 [2021-07-13 19:45:18,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-13 19:45:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-07-13 19:45:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-07-13 19:45:18,893 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-07-13 19:45:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:18,894 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-07-13 19:45:18,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-07-13 19:45:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:18,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:18,894 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,095 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 525 times [2021-07-13 19:45:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281843499] [2021-07-13 19:45:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281843499] [2021-07-13 19:45:19,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281843499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003379771] [2021-07-13 19:45:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:19,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003379771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:19,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300127582] [2021-07-13 19:45:19,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:19,433 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:19,641 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-07-13 19:45:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:19,642 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:45:19,642 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:45:19,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:45:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-07-13 19:45:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-07-13 19:45:19,646 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-07-13 19:45:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-07-13 19:45:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-07-13 19:45:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:19,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:19,647 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-07-13 19:45:19,847 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 526 times [2021-07-13 19:45:19,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235564915] [2021-07-13 19:45:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235564915] [2021-07-13 19:45:19,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235564915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958487280] [2021-07-13 19:45:19,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958487280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:20,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435428890] [2021-07-13 19:45:20,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:20,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:20,167 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:20,357 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-07-13 19:45:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:20,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:20,358 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:45:20,358 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:45:20,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:45:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-07-13 19:45:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-13 19:45:20,362 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-13 19:45:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:20,363 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-13 19:45:20,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-13 19:45:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:20,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:20,363 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:20,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,564 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:20,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 527 times [2021-07-13 19:45:20,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:20,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502540113] [2021-07-13 19:45:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:20,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502540113] [2021-07-13 19:45:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502540113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426659320] [2021-07-13 19:45:20,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:20,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:20,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:20,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426659320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186748397] [2021-07-13 19:45:20,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:20,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:20,874 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:21,083 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-07-13 19:45:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:21,084 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:45:21,084 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:45:21,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:45:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-07-13 19:45:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-07-13 19:45:21,087 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-07-13 19:45:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:21,087 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-07-13 19:45:21,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-07-13 19:45:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:21,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:21,088 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:21,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,288 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 528 times [2021-07-13 19:45:21,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:21,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135552411] [2021-07-13 19:45:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135552411] [2021-07-13 19:45:21,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135552411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305770076] [2021-07-13 19:45:21,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305770076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:21,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:21,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369588175] [2021-07-13 19:45:21,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:21,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:21,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:21,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:21,596 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:21,785 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-07-13 19:45:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:21,786 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:45:21,786 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:45:21,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:45:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-07-13 19:45:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-07-13 19:45:21,791 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-07-13 19:45:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:21,791 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-07-13 19:45:21,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-07-13 19:45:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:21,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:21,791 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:21,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,992 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 529 times [2021-07-13 19:45:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:21,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319694131] [2021-07-13 19:45:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319694131] [2021-07-13 19:45:22,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319694131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980113147] [2021-07-13 19:45:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980113147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:22,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:22,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822751837] [2021-07-13 19:45:22,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:22,311 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:22,544 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-07-13 19:45:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:22,545 INFO L225 Difference]: With dead ends: 502 [2021-07-13 19:45:22,545 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 19:45:22,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 19:45:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-07-13 19:45:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-13 19:45:22,550 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-13 19:45:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:22,550 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-13 19:45:22,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-13 19:45:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:22,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:22,550 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:22,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,751 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 530 times [2021-07-13 19:45:22,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:22,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73621051] [2021-07-13 19:45:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73621051] [2021-07-13 19:45:22,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73621051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199011388] [2021-07-13 19:45:22,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:22,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199011388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:23,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285983832] [2021-07-13 19:45:23,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:23,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:23,079 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:23,343 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-07-13 19:45:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:23,344 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:45:23,344 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:45:23,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:45:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-07-13 19:45:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:45:23,348 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-13 19:45:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:23,348 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:45:23,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:45:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:23,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:23,348 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:23,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:23,549 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 531 times [2021-07-13 19:45:23,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:23,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753164483] [2021-07-13 19:45:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753164483] [2021-07-13 19:45:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753164483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259655005] [2021-07-13 19:45:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:23,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259655005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:23,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206033939] [2021-07-13 19:45:23,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:23,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:23,840 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:24,014 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-07-13 19:45:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:24,015 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:45:24,015 INFO L226 Difference]: Without dead ends: 431 [2021-07-13 19:45:24,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-13 19:45:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-07-13 19:45:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-07-13 19:45:24,022 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-07-13 19:45:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:24,022 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-07-13 19:45:24,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-07-13 19:45:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:24,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:24,022 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:24,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4706,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,223 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 532 times [2021-07-13 19:45:24,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:24,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577815830] [2021-07-13 19:45:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577815830] [2021-07-13 19:45:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577815830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903685197] [2021-07-13 19:45:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:24,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903685197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:24,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938015618] [2021-07-13 19:45:24,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:24,541 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:24,818 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-07-13 19:45:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:24,819 INFO L225 Difference]: With dead ends: 468 [2021-07-13 19:45:24,819 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:45:24,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:45:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-07-13 19:45:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-07-13 19:45:24,823 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-07-13 19:45:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:24,823 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-07-13 19:45:24,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-07-13 19:45:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:24,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:24,824 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-07-13 19:45:25,024 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 533 times [2021-07-13 19:45:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347962884] [2021-07-13 19:45:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347962884] [2021-07-13 19:45:25,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347962884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608636272] [2021-07-13 19:45:25,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:25,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608636272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:25,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:25,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737478018] [2021-07-13 19:45:25,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:25,331 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:25,522 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-07-13 19:45:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:25,523 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:45:25,523 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:45:25,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:45:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-07-13 19:45:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-07-13 19:45:25,527 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-07-13 19:45:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:25,527 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-07-13 19:45:25,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-07-13 19:45:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:25,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:25,527 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-07-13 19:45:25,728 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 534 times [2021-07-13 19:45:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915239232] [2021-07-13 19:45:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915239232] [2021-07-13 19:45:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915239232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776427371] [2021-07-13 19:45:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776427371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:26,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284013795] [2021-07-13 19:45:26,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:26,026 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,242 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-07-13 19:45:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,243 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:45:26,243 INFO L226 Difference]: Without dead ends: 468 [2021-07-13 19:45:26,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-13 19:45:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-07-13 19:45:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-07-13 19:45:26,247 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-07-13 19:45:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,247 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-07-13 19:45:26,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-07-13 19:45:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:26,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,247 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:26,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4724,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,448 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 535 times [2021-07-13 19:45:26,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:26,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978804412] [2021-07-13 19:45:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978804412] [2021-07-13 19:45:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978804412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135797091] [2021-07-13 19:45:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135797091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:26,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:26,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585539839] [2021-07-13 19:45:26,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:26,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:26,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:26,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:26,722 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,901 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-07-13 19:45:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,902 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:45:26,902 INFO L226 Difference]: Without dead ends: 474 [2021-07-13 19:45:26,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-13 19:45:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-07-13 19:45:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-07-13 19:45:26,906 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-07-13 19:45:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,906 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-07-13 19:45:26,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-07-13 19:45:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:26,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,907 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:27,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4729 [2021-07-13 19:45:27,107 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 536 times [2021-07-13 19:45:27,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:27,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220591408] [2021-07-13 19:45:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:27,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220591408] [2021-07-13 19:45:27,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220591408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852165429] [2021-07-13 19:45:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852165429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:27,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:27,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564075985] [2021-07-13 19:45:27,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:27,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:27,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:27,403 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:27,558 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-07-13 19:45:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:27,559 INFO L225 Difference]: With dead ends: 449 [2021-07-13 19:45:27,559 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:45:27,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:45:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-07-13 19:45:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-13 19:45:27,563 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-13 19:45:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:27,563 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-13 19:45:27,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-13 19:45:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:27,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:27,564 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:27,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,764 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 537 times [2021-07-13 19:45:27,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:27,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656351646] [2021-07-13 19:45:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:27,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656351646] [2021-07-13 19:45:27,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656351646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331673611] [2021-07-13 19:45:27,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:27,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:27,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331673611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:28,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:28,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092946096] [2021-07-13 19:45:28,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:28,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:28,098 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:28,455 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-07-13 19:45:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:28,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:28,456 INFO L225 Difference]: With dead ends: 662 [2021-07-13 19:45:28,456 INFO L226 Difference]: Without dead ends: 662 [2021-07-13 19:45:28,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-13 19:45:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-07-13 19:45:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.023026315789474) internal successors, (919), 304 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-07-13 19:45:28,461 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-07-13 19:45:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:28,461 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-07-13 19:45:28,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-07-13 19:45:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:28,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:28,462 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:28,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4738,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,662 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 538 times [2021-07-13 19:45:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:28,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70919852] [2021-07-13 19:45:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70919852] [2021-07-13 19:45:28,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70919852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2568788] [2021-07-13 19:45:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2568788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:28,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:28,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905776669] [2021-07-13 19:45:28,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:28,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:28,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:28,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:28,990 INFO L87 Difference]: Start difference. First operand 305 states and 919 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:29,239 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-07-13 19:45:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:29,240 INFO L225 Difference]: With dead ends: 616 [2021-07-13 19:45:29,240 INFO L226 Difference]: Without dead ends: 610 [2021-07-13 19:45:29,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-13 19:45:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-07-13 19:45:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-07-13 19:45:29,249 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-07-13 19:45:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:29,249 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-07-13 19:45:29,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-07-13 19:45:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:29,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:29,250 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:29,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4747 [2021-07-13 19:45:29,450 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 539 times [2021-07-13 19:45:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:29,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809822476] [2021-07-13 19:45:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809822476] [2021-07-13 19:45:29,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809822476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702576945] [2021-07-13 19:45:29,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:29,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702576945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:29,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:29,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102300334] [2021-07-13 19:45:29,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:29,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:29,783 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:30,036 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-07-13 19:45:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:30,038 INFO L225 Difference]: With dead ends: 668 [2021-07-13 19:45:30,038 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 19:45:30,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 19:45:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-07-13 19:45:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0193548387096776) internal successors, (936), 310 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-07-13 19:45:30,042 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-07-13 19:45:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:30,042 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-07-13 19:45:30,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-07-13 19:45:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:30,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:30,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:30,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,243 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 540 times [2021-07-13 19:45:30,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:30,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686201630] [2021-07-13 19:45:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686201630] [2021-07-13 19:45:30,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686201630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049252088] [2021-07-13 19:45:30,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049252088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:30,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333492635] [2021-07-13 19:45:30,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:30,582 INFO L87 Difference]: Start difference. First operand 311 states and 936 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:30,858 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-07-13 19:45:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:30,860 INFO L225 Difference]: With dead ends: 631 [2021-07-13 19:45:30,860 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:45:30,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:45:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-07-13 19:45:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-07-13 19:45:30,864 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-07-13 19:45:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:30,864 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-07-13 19:45:30,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-07-13 19:45:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:30,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:30,865 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:31,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-07-13 19:45:31,065 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 541 times [2021-07-13 19:45:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:31,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435933503] [2021-07-13 19:45:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:31,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435933503] [2021-07-13 19:45:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435933503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120418074] [2021-07-13 19:45:31,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120418074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:31,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640840405] [2021-07-13 19:45:31,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:31,377 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:31,669 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-07-13 19:45:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:31,670 INFO L225 Difference]: With dead ends: 656 [2021-07-13 19:45:31,670 INFO L226 Difference]: Without dead ends: 650 [2021-07-13 19:45:31,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-13 19:45:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-07-13 19:45:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-07-13 19:45:31,675 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-07-13 19:45:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:31,675 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-07-13 19:45:31,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-07-13 19:45:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:31,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:31,676 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:31,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,876 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 542 times [2021-07-13 19:45:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:31,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112581980] [2021-07-13 19:45:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:31,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112581980] [2021-07-13 19:45:31,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112581980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721745255] [2021-07-13 19:45:31,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:32,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721745255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:32,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:32,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638399692] [2021-07-13 19:45:32,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:32,191 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:32,559 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-07-13 19:45:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:32,560 INFO L225 Difference]: With dead ends: 662 [2021-07-13 19:45:32,560 INFO L226 Difference]: Without dead ends: 662 [2021-07-13 19:45:32,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-13 19:45:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-07-13 19:45:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-13 19:45:32,565 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-13 19:45:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:32,565 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-13 19:45:32,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-13 19:45:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:32,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:32,566 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:32,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4789 [2021-07-13 19:45:32,766 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 543 times [2021-07-13 19:45:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:32,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460440853] [2021-07-13 19:45:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:32,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460440853] [2021-07-13 19:45:32,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460440853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661251980] [2021-07-13 19:45:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:32,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:32,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661251980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:33,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080080853] [2021-07-13 19:45:33,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:33,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:33,089 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:33,356 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-07-13 19:45:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:33,357 INFO L225 Difference]: With dead ends: 613 [2021-07-13 19:45:33,357 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 19:45:33,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 19:45:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-07-13 19:45:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.031847133757962) internal successors, (952), 314 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-07-13 19:45:33,362 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-07-13 19:45:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:33,362 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-07-13 19:45:33,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-07-13 19:45:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:33,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:33,362 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:33,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4802,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:33,563 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:33,563 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 544 times [2021-07-13 19:45:33,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:33,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283795156] [2021-07-13 19:45:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283795156] [2021-07-13 19:45:33,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283795156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122481794] [2021-07-13 19:45:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:33,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122481794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:33,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856560115] [2021-07-13 19:45:33,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:33,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:33,939 INFO L87 Difference]: Start difference. First operand 315 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:34,195 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-07-13 19:45:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:34,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:34,196 INFO L225 Difference]: With dead ends: 601 [2021-07-13 19:45:34,196 INFO L226 Difference]: Without dead ends: 601 [2021-07-13 19:45:34,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-13 19:45:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-07-13 19:45:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-07-13 19:45:34,200 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-07-13 19:45:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:34,200 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-07-13 19:45:34,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-07-13 19:45:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:34,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:34,201 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:34,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4809 [2021-07-13 19:45:34,401 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 545 times [2021-07-13 19:45:34,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:34,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565631598] [2021-07-13 19:45:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565631598] [2021-07-13 19:45:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565631598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005019603] [2021-07-13 19:45:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:34,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:34,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:34,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005019603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:34,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:34,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459146964] [2021-07-13 19:45:34,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:34,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:34,718 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:34,962 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-07-13 19:45:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:34,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:34,963 INFO L225 Difference]: With dead ends: 556 [2021-07-13 19:45:34,963 INFO L226 Difference]: Without dead ends: 556 [2021-07-13 19:45:34,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-13 19:45:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-07-13 19:45:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-13 19:45:34,967 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-13 19:45:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:34,968 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-13 19:45:34,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-13 19:45:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:34,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:34,968 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-07-13 19:45:35,169 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 546 times [2021-07-13 19:45:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425020046] [2021-07-13 19:45:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425020046] [2021-07-13 19:45:35,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425020046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326002978] [2021-07-13 19:45:35,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:35,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326002978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:35,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767706330] [2021-07-13 19:45:35,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:35,517 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:35,792 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-07-13 19:45:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:35,794 INFO L225 Difference]: With dead ends: 595 [2021-07-13 19:45:35,794 INFO L226 Difference]: Without dead ends: 589 [2021-07-13 19:45:35,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-13 19:45:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-07-13 19:45:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.009493670886076) internal successors, (951), 316 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-07-13 19:45:35,798 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-07-13 19:45:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:35,798 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-07-13 19:45:35,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-07-13 19:45:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:35,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:35,799 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,999 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 547 times [2021-07-13 19:45:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994721349] [2021-07-13 19:45:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:36,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994721349] [2021-07-13 19:45:36,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994721349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242851769] [2021-07-13 19:45:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242851769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:36,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333018944] [2021-07-13 19:45:36,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:36,330 INFO L87 Difference]: Start difference. First operand 317 states and 951 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:36,605 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-07-13 19:45:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:36,606 INFO L225 Difference]: With dead ends: 601 [2021-07-13 19:45:36,606 INFO L226 Difference]: Without dead ends: 601 [2021-07-13 19:45:36,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-13 19:45:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-07-13 19:45:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-07-13 19:45:36,610 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-07-13 19:45:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:36,620 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-07-13 19:45:36,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-07-13 19:45:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:36,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:36,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:36,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4834 [2021-07-13 19:45:36,822 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 548 times [2021-07-13 19:45:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:36,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939392131] [2021-07-13 19:45:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939392131] [2021-07-13 19:45:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939392131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587876015] [2021-07-13 19:45:36,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587876015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:37,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:37,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963483443] [2021-07-13 19:45:37,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:37,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:37,168 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:37,465 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-07-13 19:45:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:37,466 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:45:37,466 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:45:37,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:45:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-07-13 19:45:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0032362459546924) internal successors, (928), 309 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-07-13 19:45:37,470 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-07-13 19:45:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:37,471 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-07-13 19:45:37,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-07-13 19:45:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:37,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:37,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:37,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,672 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 549 times [2021-07-13 19:45:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809642368] [2021-07-13 19:45:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:37,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809642368] [2021-07-13 19:45:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809642368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332675737] [2021-07-13 19:45:37,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332675737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:38,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553555211] [2021-07-13 19:45:38,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:38,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:38,018 INFO L87 Difference]: Start difference. First operand 310 states and 928 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:38,308 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-07-13 19:45:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:38,310 INFO L225 Difference]: With dead ends: 600 [2021-07-13 19:45:38,310 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:45:38,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:45:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-07-13 19:45:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-07-13 19:45:38,316 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-07-13 19:45:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:38,316 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-07-13 19:45:38,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-07-13 19:45:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:38,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:38,316 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:38,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4847 [2021-07-13 19:45:38,517 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 550 times [2021-07-13 19:45:38,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:38,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026229797] [2021-07-13 19:45:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026229797] [2021-07-13 19:45:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026229797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278117211] [2021-07-13 19:45:38,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:38,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278117211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:38,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900726436] [2021-07-13 19:45:38,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:38,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:38,881 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:39,158 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-07-13 19:45:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:39,159 INFO L225 Difference]: With dead ends: 602 [2021-07-13 19:45:39,159 INFO L226 Difference]: Without dead ends: 602 [2021-07-13 19:45:39,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-13 19:45:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-07-13 19:45:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.983818770226537) internal successors, (922), 309 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-07-13 19:45:39,164 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-07-13 19:45:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:39,164 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-07-13 19:45:39,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-07-13 19:45:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:39,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:39,164 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:39,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,365 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:39,365 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 551 times [2021-07-13 19:45:39,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:39,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884652629] [2021-07-13 19:45:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:39,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884652629] [2021-07-13 19:45:39,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884652629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608930831] [2021-07-13 19:45:39,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608930831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:39,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717067648] [2021-07-13 19:45:39,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:39,713 INFO L87 Difference]: Start difference. First operand 310 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:39,994 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-07-13 19:45:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:39,995 INFO L225 Difference]: With dead ends: 547 [2021-07-13 19:45:39,995 INFO L226 Difference]: Without dead ends: 547 [2021-07-13 19:45:39,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-13 19:45:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-07-13 19:45:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-07-13 19:45:40,001 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-07-13 19:45:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,001 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-07-13 19:45:40,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-07-13 19:45:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:40,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,002 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,202 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 552 times [2021-07-13 19:45:40,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297948763] [2021-07-13 19:45:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297948763] [2021-07-13 19:45:40,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297948763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107290934] [2021-07-13 19:45:40,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:40,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107290934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:40,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698458188] [2021-07-13 19:45:40,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:40,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:40,512 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,788 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-07-13 19:45:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,789 INFO L225 Difference]: With dead ends: 570 [2021-07-13 19:45:40,789 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 19:45:40,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 19:45:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-07-13 19:45:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:45:40,794 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-13 19:45:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,794 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:45:40,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:45:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:40,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,794 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,995 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 553 times [2021-07-13 19:45:40,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624470025] [2021-07-13 19:45:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624470025] [2021-07-13 19:45:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624470025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548055474] [2021-07-13 19:45:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:41,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548055474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:41,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:41,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320777313] [2021-07-13 19:45:41,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:41,327 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:41,642 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-07-13 19:45:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:41,643 INFO L225 Difference]: With dead ends: 635 [2021-07-13 19:45:41,643 INFO L226 Difference]: Without dead ends: 629 [2021-07-13 19:45:41,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-13 19:45:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-07-13 19:45:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9581993569131835) internal successors, (920), 311 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-07-13 19:45:41,648 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-07-13 19:45:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:41,648 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-07-13 19:45:41,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-07-13 19:45:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:41,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:41,648 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:41,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4872,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,849 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 554 times [2021-07-13 19:45:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:41,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507194130] [2021-07-13 19:45:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:41,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507194130] [2021-07-13 19:45:41,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507194130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469046607] [2021-07-13 19:45:41,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469046607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:42,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:42,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403402902] [2021-07-13 19:45:42,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:42,169 INFO L87 Difference]: Start difference. First operand 312 states and 920 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:42,545 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-07-13 19:45:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:42,546 INFO L225 Difference]: With dead ends: 641 [2021-07-13 19:45:42,547 INFO L226 Difference]: Without dead ends: 641 [2021-07-13 19:45:42,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-07-13 19:45:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-07-13 19:45:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9611650485436893) internal successors, (915), 309 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-07-13 19:45:42,552 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-07-13 19:45:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:42,552 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-07-13 19:45:42,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-07-13 19:45:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:42,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:42,553 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:42,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4880,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,753 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 555 times [2021-07-13 19:45:42,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:42,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699955128] [2021-07-13 19:45:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699955128] [2021-07-13 19:45:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699955128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199388333] [2021-07-13 19:45:42,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:42,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199388333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:43,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:43,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168507525] [2021-07-13 19:45:43,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:43,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:43,081 INFO L87 Difference]: Start difference. First operand 310 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:43,396 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-07-13 19:45:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:43,397 INFO L225 Difference]: With dead ends: 624 [2021-07-13 19:45:43,397 INFO L226 Difference]: Without dead ends: 624 [2021-07-13 19:45:43,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-13 19:45:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-07-13 19:45:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.964169381107492) internal successors, (910), 307 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-07-13 19:45:43,402 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-07-13 19:45:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:43,402 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-07-13 19:45:43,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-07-13 19:45:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:43,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:43,402 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:43,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,603 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 556 times [2021-07-13 19:45:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:43,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444494931] [2021-07-13 19:45:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444494931] [2021-07-13 19:45:43,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444494931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200862964] [2021-07-13 19:45:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200862964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:43,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771837181] [2021-07-13 19:45:43,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:43,914 INFO L87 Difference]: Start difference. First operand 308 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:44,228 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-07-13 19:45:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:44,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:44,229 INFO L225 Difference]: With dead ends: 649 [2021-07-13 19:45:44,229 INFO L226 Difference]: Without dead ends: 649 [2021-07-13 19:45:44,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-13 19:45:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-07-13 19:45:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-13 19:45:44,233 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-13 19:45:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:44,234 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-13 19:45:44,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-13 19:45:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:44,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:44,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:44,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4894,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,435 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 557 times [2021-07-13 19:45:44,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:44,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276548897] [2021-07-13 19:45:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276548897] [2021-07-13 19:45:44,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276548897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542356991] [2021-07-13 19:45:44,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:44,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542356991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:44,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:44,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446697259] [2021-07-13 19:45:44,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:44,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:44,740 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:44,983 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-07-13 19:45:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:44,984 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:45:44,984 INFO L226 Difference]: Without dead ends: 434 [2021-07-13 19:45:44,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-13 19:45:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-07-13 19:45:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-13 19:45:44,989 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-13 19:45:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:44,989 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-13 19:45:44,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-13 19:45:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:44,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:44,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:45,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,191 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 558 times [2021-07-13 19:45:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:45,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624121146] [2021-07-13 19:45:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624121146] [2021-07-13 19:45:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624121146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470541609] [2021-07-13 19:45:45,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:45,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470541609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:45,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:45,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285779129] [2021-07-13 19:45:45,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:45,500 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:45,800 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-07-13 19:45:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:45,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:45,801 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:45:45,801 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:45:45,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:45:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-07-13 19:45:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-13 19:45:45,806 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-13 19:45:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:45,806 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-13 19:45:45,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-13 19:45:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:45,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:45,806 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:46,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4907 [2021-07-13 19:45:46,023 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 559 times [2021-07-13 19:45:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:46,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502732384] [2021-07-13 19:45:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502732384] [2021-07-13 19:45:46,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502732384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676552456] [2021-07-13 19:45:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676552456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:46,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:46,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640150261] [2021-07-13 19:45:46,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:46,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:46,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:46,320 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:46,525 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-07-13 19:45:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:46,526 INFO L225 Difference]: With dead ends: 442 [2021-07-13 19:45:46,526 INFO L226 Difference]: Without dead ends: 442 [2021-07-13 19:45:46,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-13 19:45:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-07-13 19:45:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-13 19:45:46,530 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-13 19:45:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:46,530 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-13 19:45:46,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-13 19:45:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:46,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:46,530 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:46,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4912 [2021-07-13 19:45:46,731 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 560 times [2021-07-13 19:45:46,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:46,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839903176] [2021-07-13 19:45:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:46,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839903176] [2021-07-13 19:45:46,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839903176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920253027] [2021-07-13 19:45:46,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:46,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:46,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920253027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:47,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687273145] [2021-07-13 19:45:47,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:47,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:47,013 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:47,230 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-07-13 19:45:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:47,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:47,231 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:45:47,231 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:45:47,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:45:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-07-13 19:45:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-07-13 19:45:47,235 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-07-13 19:45:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:47,235 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-07-13 19:45:47,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-07-13 19:45:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:47,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:47,236 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:47,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-07-13 19:45:47,436 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 561 times [2021-07-13 19:45:47,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:47,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248712871] [2021-07-13 19:45:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248712871] [2021-07-13 19:45:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248712871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050860247] [2021-07-13 19:45:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:47,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:47,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050860247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:47,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593238967] [2021-07-13 19:45:47,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:47,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:47,706 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:47,898 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-07-13 19:45:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:47,899 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:45:47,900 INFO L226 Difference]: Without dead ends: 477 [2021-07-13 19:45:47,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-13 19:45:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-07-13 19:45:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-07-13 19:45:47,904 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-07-13 19:45:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:47,904 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-07-13 19:45:47,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-07-13 19:45:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:47,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:47,904 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:48,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-07-13 19:45:48,105 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 562 times [2021-07-13 19:45:48,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:48,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260444267] [2021-07-13 19:45:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260444267] [2021-07-13 19:45:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260444267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690551695] [2021-07-13 19:45:48,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:48,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690551695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:48,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:48,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865909057] [2021-07-13 19:45:48,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:48,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:48,374 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:48,568 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-07-13 19:45:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:48,569 INFO L225 Difference]: With dead ends: 452 [2021-07-13 19:45:48,570 INFO L226 Difference]: Without dead ends: 452 [2021-07-13 19:45:48,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-13 19:45:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-07-13 19:45:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-07-13 19:45:48,574 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-07-13 19:45:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:48,574 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-07-13 19:45:48,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-07-13 19:45:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:48,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:48,574 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:48,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4927,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,775 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 563 times [2021-07-13 19:45:48,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:48,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140598283] [2021-07-13 19:45:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:48,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140598283] [2021-07-13 19:45:48,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140598283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446666399] [2021-07-13 19:45:48,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:48,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446666399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:49,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:49,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712229187] [2021-07-13 19:45:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:49,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:49,057 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:49,270 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-07-13 19:45:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:49,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:49,271 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:45:49,271 INFO L226 Difference]: Without dead ends: 530 [2021-07-13 19:45:49,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-13 19:45:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-07-13 19:45:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.951923076923077) internal successors, (921), 312 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-07-13 19:45:49,275 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-07-13 19:45:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:49,275 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-07-13 19:45:49,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-07-13 19:45:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:49,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:49,276 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:49,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-07-13 19:45:49,476 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 564 times [2021-07-13 19:45:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911082963] [2021-07-13 19:45:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:49,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911082963] [2021-07-13 19:45:49,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911082963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651987271] [2021-07-13 19:45:49,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:49,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:49,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651987271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:49,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802574029] [2021-07-13 19:45:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:49,761 INFO L87 Difference]: Start difference. First operand 313 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:50,013 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-07-13 19:45:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:50,015 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:45:50,015 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:45:50,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:45:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-07-13 19:45:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-07-13 19:45:50,019 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-07-13 19:45:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:50,019 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-07-13 19:45:50,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-07-13 19:45:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:50,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:50,020 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:50,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4934,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:50,221 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 565 times [2021-07-13 19:45:50,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:50,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794494230] [2021-07-13 19:45:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794494230] [2021-07-13 19:45:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794494230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692528798] [2021-07-13 19:45:50,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692528798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:50,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692768672] [2021-07-13 19:45:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:50,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:50,491 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:50,690 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-07-13 19:45:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:50,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:50,692 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:45:50,692 INFO L226 Difference]: Without dead ends: 525 [2021-07-13 19:45:50,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-13 19:45:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-07-13 19:45:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.957792207792208) internal successors, (911), 308 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-07-13 19:45:50,696 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-07-13 19:45:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:50,696 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-07-13 19:45:50,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-07-13 19:45:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:50,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:50,696 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:50,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4939 [2021-07-13 19:45:50,897 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 566 times [2021-07-13 19:45:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:50,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995747306] [2021-07-13 19:45:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995747306] [2021-07-13 19:45:50,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995747306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207111963] [2021-07-13 19:45:50,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:51,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207111963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:51,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:51,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332700016] [2021-07-13 19:45:51,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:51,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:51,141 INFO L87 Difference]: Start difference. First operand 309 states and 911 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:51,322 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-07-13 19:45:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:51,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:51,323 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:45:51,323 INFO L226 Difference]: Without dead ends: 515 [2021-07-13 19:45:51,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-13 19:45:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-07-13 19:45:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-13 19:45:51,327 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-13 19:45:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:51,328 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-13 19:45:51,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-13 19:45:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:51,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:51,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:51,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4942 [2021-07-13 19:45:51,529 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 567 times [2021-07-13 19:45:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:51,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177033446] [2021-07-13 19:45:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:51,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177033446] [2021-07-13 19:45:51,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177033446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549607700] [2021-07-13 19:45:51,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:51,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:51,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:51,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549607700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:51,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:51,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113266685] [2021-07-13 19:45:51,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:51,777 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:52,036 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-07-13 19:45:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:52,037 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:45:52,037 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:45:52,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:45:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-07-13 19:45:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-13 19:45:52,041 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-13 19:45:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:52,041 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-13 19:45:52,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-13 19:45:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:52,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:52,041 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:52,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,242 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 568 times [2021-07-13 19:45:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:52,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152559982] [2021-07-13 19:45:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:52,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152559982] [2021-07-13 19:45:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152559982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250381926] [2021-07-13 19:45:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250381926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:52,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:52,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991313145] [2021-07-13 19:45:52,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:52,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:52,515 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:52,797 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-07-13 19:45:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:52,798 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:45:52,798 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:45:52,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:45:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-07-13 19:45:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-13 19:45:52,802 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-13 19:45:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:52,802 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-13 19:45:52,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-13 19:45:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:52,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:52,802 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:53,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4951 [2021-07-13 19:45:53,003 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 569 times [2021-07-13 19:45:53,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:53,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406649991] [2021-07-13 19:45:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406649991] [2021-07-13 19:45:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406649991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545253431] [2021-07-13 19:45:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:53,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545253431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:53,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:53,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463664184] [2021-07-13 19:45:53,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:53,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:53,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:53,270 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:53,701 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-07-13 19:45:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:53,702 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:45:53,702 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:45:53,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:45:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-07-13 19:45:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-13 19:45:53,711 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-13 19:45:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:53,711 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-13 19:45:53,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-13 19:45:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:53,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:53,712 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:53,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-07-13 19:45:53,912 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 570 times [2021-07-13 19:45:53,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:53,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598446292] [2021-07-13 19:45:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598446292] [2021-07-13 19:45:53,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598446292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430639522] [2021-07-13 19:45:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430639522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:54,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:54,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323279902] [2021-07-13 19:45:54,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:54,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:54,176 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:54,468 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-07-13 19:45:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:54,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:54,469 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:45:54,469 INFO L226 Difference]: Without dead ends: 483 [2021-07-13 19:45:54,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-13 19:45:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-07-13 19:45:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-07-13 19:45:54,473 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-07-13 19:45:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:54,473 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-07-13 19:45:54,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-07-13 19:45:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:54,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:54,474 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:54,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,675 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 571 times [2021-07-13 19:45:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:54,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77483354] [2021-07-13 19:45:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:54,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77483354] [2021-07-13 19:45:54,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77483354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292158482] [2021-07-13 19:45:54,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292158482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:54,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:54,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493906861] [2021-07-13 19:45:54,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:54,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:54,936 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:55,154 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-07-13 19:45:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:55,155 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:45:55,155 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 19:45:55,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 19:45:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-07-13 19:45:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-13 19:45:55,159 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-13 19:45:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:55,159 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-13 19:45:55,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-13 19:45:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:55,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:55,160 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:55,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4967 [2021-07-13 19:45:55,360 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 572 times [2021-07-13 19:45:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:55,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199496536] [2021-07-13 19:45:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199496536] [2021-07-13 19:45:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199496536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474955795] [2021-07-13 19:45:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:55,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:55,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474955795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:55,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019669617] [2021-07-13 19:45:55,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:55,610 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:55,885 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-07-13 19:45:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:55,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:55,886 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:45:55,886 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:45:55,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:45:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-07-13 19:45:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-13 19:45:55,890 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-13 19:45:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:55,890 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-13 19:45:55,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-13 19:45:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:55,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:55,890 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:56,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,091 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 573 times [2021-07-13 19:45:56,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:56,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048912760] [2021-07-13 19:45:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048912760] [2021-07-13 19:45:56,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048912760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593321859] [2021-07-13 19:45:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593321859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:56,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955276521] [2021-07-13 19:45:56,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:56,337 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:56,564 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-07-13 19:45:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:56,564 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:45:56,564 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:45:56,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:45:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-07-13 19:45:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-13 19:45:56,568 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-13 19:45:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:56,568 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-13 19:45:56,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-13 19:45:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:56,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:56,569 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:56,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4981 [2021-07-13 19:45:56,769 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 574 times [2021-07-13 19:45:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265990187] [2021-07-13 19:45:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:56,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265990187] [2021-07-13 19:45:56,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265990187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280371440] [2021-07-13 19:45:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280371440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:57,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231113111] [2021-07-13 19:45:57,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:57,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:57,004 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:57,205 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-07-13 19:45:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:57,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:57,206 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:45:57,206 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:45:57,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:45:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-07-13 19:45:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-07-13 19:45:57,210 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-07-13 19:45:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:57,210 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-07-13 19:45:57,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-07-13 19:45:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:57,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:57,210 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:57,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:57,411 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 575 times [2021-07-13 19:45:57,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:57,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158296800] [2021-07-13 19:45:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:57,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158296800] [2021-07-13 19:45:57,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158296800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159372712] [2021-07-13 19:45:57,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:57,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:57,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159372712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:57,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616483380] [2021-07-13 19:45:57,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:57,645 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:57,890 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-07-13 19:45:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:57,891 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:45:57,891 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:45:57,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:45:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-07-13 19:45:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-07-13 19:45:57,895 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-07-13 19:45:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:57,895 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-07-13 19:45:57,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-07-13 19:45:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:57,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:57,896 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:58,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4991 [2021-07-13 19:45:58,096 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 576 times [2021-07-13 19:45:58,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:58,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195111985] [2021-07-13 19:45:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:58,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195111985] [2021-07-13 19:45:58,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195111985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312529670] [2021-07-13 19:45:58,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312529670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:58,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:58,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975532523] [2021-07-13 19:45:58,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:58,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:58,314 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:58,499 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-07-13 19:45:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:58,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:58,500 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:45:58,500 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:45:58,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:45:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-07-13 19:45:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-13 19:45:58,503 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-13 19:45:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:58,503 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-13 19:45:58,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-13 19:45:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:58,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:58,504 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:58,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4996,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,704 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:58,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 577 times [2021-07-13 19:45:58,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:58,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92627528] [2021-07-13 19:45:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:58,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92627528] [2021-07-13 19:45:58,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92627528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428476148] [2021-07-13 19:45:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428476148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:58,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644854364] [2021-07-13 19:45:58,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:58,954 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:59,181 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-07-13 19:45:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:59,182 INFO L225 Difference]: With dead ends: 422 [2021-07-13 19:45:59,182 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 19:45:59,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 19:45:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-07-13 19:45:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-13 19:45:59,186 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-13 19:45:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:59,186 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-13 19:45:59,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-13 19:45:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:59,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:59,186 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:59,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4998 [2021-07-13 19:45:59,387 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:59,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 578 times [2021-07-13 19:45:59,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:59,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649647485] [2021-07-13 19:45:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:59,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649647485] [2021-07-13 19:45:59,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649647485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508445899] [2021-07-13 19:45:59,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:59,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:59,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508445899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:59,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491879282] [2021-07-13 19:45:59,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:59,633 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:59,909 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-07-13 19:45:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:59,910 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:45:59,910 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:45:59,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:45:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-07-13 19:45:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-13 19:45:59,914 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-13 19:45:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-13 19:45:59,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-13 19:45:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:59,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:59,915 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:00,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,115 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:00,115 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 579 times [2021-07-13 19:46:00,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:00,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954663942] [2021-07-13 19:46:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954663942] [2021-07-13 19:46:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954663942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942183524] [2021-07-13 19:46:00,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:00,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942183524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:00,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158539132] [2021-07-13 19:46:00,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:00,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:00,358 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:00,572 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-07-13 19:46:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:00,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:00,573 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:46:00,573 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:46:00,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:46:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-07-13 19:46:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-13 19:46:00,577 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-13 19:46:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:00,577 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-13 19:46:00,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-13 19:46:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:00,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:00,577 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:00,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-07-13 19:46:00,778 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 580 times [2021-07-13 19:46:00,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:00,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855854820] [2021-07-13 19:46:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:00,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855854820] [2021-07-13 19:46:00,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855854820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358611714] [2021-07-13 19:46:00,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:00,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:01,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358611714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:01,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:01,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138051097] [2021-07-13 19:46:01,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:01,020 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:01,223 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-07-13 19:46:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:01,224 INFO L225 Difference]: With dead ends: 453 [2021-07-13 19:46:01,224 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:46:01,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:46:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-07-13 19:46:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-07-13 19:46:01,228 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-07-13 19:46:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:01,228 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-07-13 19:46:01,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-07-13 19:46:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:01,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:01,229 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:01,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5021 [2021-07-13 19:46:01,429 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 581 times [2021-07-13 19:46:01,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:01,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747248546] [2021-07-13 19:46:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:01,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:01,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747248546] [2021-07-13 19:46:01,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747248546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:01,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992903976] [2021-07-13 19:46:01,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:01,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:01,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:01,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:01,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992903976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:01,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:01,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:01,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553036692] [2021-07-13 19:46:01,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:01,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:01,668 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:01,900 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-07-13 19:46:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:01,901 INFO L225 Difference]: With dead ends: 453 [2021-07-13 19:46:01,901 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 19:46:01,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 19:46:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-07-13 19:46:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-07-13 19:46:01,909 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-07-13 19:46:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:01,909 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-07-13 19:46:01,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-07-13 19:46:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:01,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:01,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:02,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,110 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 582 times [2021-07-13 19:46:02,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:02,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142084744] [2021-07-13 19:46:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142084744] [2021-07-13 19:46:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142084744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729638857] [2021-07-13 19:46:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:02,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:02,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729638857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:02,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:02,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369672621] [2021-07-13 19:46:02,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:02,342 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:02,549 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-07-13 19:46:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:02,550 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:46:02,550 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:46:02,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:46:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-07-13 19:46:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-07-13 19:46:02,553 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-07-13 19:46:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:02,553 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-07-13 19:46:02,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-07-13 19:46:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:02,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:02,554 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:02,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5032 [2021-07-13 19:46:02,754 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 583 times [2021-07-13 19:46:02,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:02,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138062476] [2021-07-13 19:46:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138062476] [2021-07-13 19:46:02,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138062476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391581403] [2021-07-13 19:46:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391581403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:02,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:02,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280637568] [2021-07-13 19:46:02,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:02,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:02,987 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:03,219 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-07-13 19:46:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:03,220 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:46:03,220 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:46:03,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:46:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-07-13 19:46:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9456869009584663) internal successors, (922), 313 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-07-13 19:46:03,224 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-07-13 19:46:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:03,224 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-07-13 19:46:03,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-07-13 19:46:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:03,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:03,225 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:03,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-07-13 19:46:03,425 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 584 times [2021-07-13 19:46:03,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:03,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602529068] [2021-07-13 19:46:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:03,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602529068] [2021-07-13 19:46:03,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602529068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971317974] [2021-07-13 19:46:03,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971317974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:03,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007437138] [2021-07-13 19:46:03,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:03,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:03,666 INFO L87 Difference]: Start difference. First operand 314 states and 922 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:03,939 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-07-13 19:46:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:03,940 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:46:03,940 INFO L226 Difference]: Without dead ends: 504 [2021-07-13 19:46:03,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-13 19:46:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-07-13 19:46:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-07-13 19:46:03,944 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-07-13 19:46:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:03,945 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-07-13 19:46:03,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-07-13 19:46:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:03,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:03,945 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:04,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,146 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 585 times [2021-07-13 19:46:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154417230] [2021-07-13 19:46:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154417230] [2021-07-13 19:46:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154417230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609259089] [2021-07-13 19:46:04,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:04,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609259089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072332787] [2021-07-13 19:46:04,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:04,386 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:04,625 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-07-13 19:46:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:04,626 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:46:04,626 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:46:04,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:46:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-07-13 19:46:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9514563106796117) internal successors, (912), 309 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-07-13 19:46:04,630 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-07-13 19:46:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:04,630 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-07-13 19:46:04,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-07-13 19:46:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:04,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:04,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:04,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5044,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,831 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 586 times [2021-07-13 19:46:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:04,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942637370] [2021-07-13 19:46:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:04,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942637370] [2021-07-13 19:46:04,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942637370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251087614] [2021-07-13 19:46:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:05,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251087614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:05,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:05,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:46:05,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898144861] [2021-07-13 19:46:05,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:46:05,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:46:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:46:05,041 INFO L87 Difference]: Start difference. First operand 310 states and 912 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:05,246 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-07-13 19:46:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:05,247 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:46:05,247 INFO L226 Difference]: Without dead ends: 483 [2021-07-13 19:46:05,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-13 19:46:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-07-13 19:46:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-13 19:46:05,251 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-13 19:46:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:05,251 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-13 19:46:05,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-13 19:46:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:05,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:05,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:05,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-07-13 19:46:05,452 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2020715594, now seen corresponding path program 587 times [2021-07-13 19:46:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:05,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419325843] [2021-07-13 19:46:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:05,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:05,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419325843] [2021-07-13 19:46:05,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419325843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:05,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568669423] [2021-07-13 19:46:05,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:05,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:46:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:06,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:46:06,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:46:06,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,244 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-07-13 19:46:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:06,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:06,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:06,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:06,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-07-13 19:46:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:06,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568669423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:06,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:06,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:46:06,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370983506] [2021-07-13 19:46:06,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:06,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:06,422 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,860 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-07-13 19:46:08,172 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-07-13 19:46:08,389 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-13 19:46:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:08,710 INFO L93 Difference]: Finished difference Result 742 states and 2196 transitions. [2021-07-13 19:46:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:46:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:08,711 INFO L225 Difference]: With dead ends: 742 [2021-07-13 19:46:08,711 INFO L226 Difference]: Without dead ends: 654 [2021-07-13 19:46:08,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2067.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:46:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-13 19:46:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 354. [2021-07-13 19:46:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.997167138810198) internal successors, (1058), 353 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2021-07-13 19:46:08,716 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 21 [2021-07-13 19:46:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:08,717 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2021-07-13 19:46:08,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2021-07-13 19:46:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:08,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:08,717 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:08,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:08,917 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1242995883, now seen corresponding path program 1 times [2021-07-13 19:46:08,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:08,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558590165] [2021-07-13 19:46:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558590165] [2021-07-13 19:46:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558590165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630215345] [2021-07-13 19:46:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:09,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:09,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:09,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:09,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:09,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:09,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:09,213 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-13 19:46:09,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:09,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-13 19:46:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:09,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630215345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:09,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:09,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142956491] [2021-07-13 19:46:09,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:09,251 INFO L87 Difference]: Start difference. First operand 354 states and 1058 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:10,546 INFO L93 Difference]: Finished difference Result 803 states and 2292 transitions. [2021-07-13 19:46:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:46:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:10,547 INFO L225 Difference]: With dead ends: 803 [2021-07-13 19:46:10,547 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 19:46:10,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 800.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:46:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 19:46:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 417. [2021-07-13 19:46:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.045673076923077) internal successors, (1267), 416 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1267 transitions. [2021-07-13 19:46:10,553 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1267 transitions. Word has length 21 [2021-07-13 19:46:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:10,553 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1267 transitions. [2021-07-13 19:46:10,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1267 transitions. [2021-07-13 19:46:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:10,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:10,554 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:10,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5101 [2021-07-13 19:46:10,770 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash 315215179, now seen corresponding path program 2 times [2021-07-13 19:46:10,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:10,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472805] [2021-07-13 19:46:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:10,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:10,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472805] [2021-07-13 19:46:10,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:10,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025573709] [2021-07-13 19:46:10,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:10,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:11,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:11,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:11,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:11,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:11,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:11,084 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-13 19:46:11,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:11,085 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-13 19:46:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:11,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025573709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:11,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:11,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072658461] [2021-07-13 19:46:11,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:11,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:11,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:11,128 INFO L87 Difference]: Start difference. First operand 417 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:12,433 INFO L93 Difference]: Finished difference Result 1000 states and 2902 transitions. [2021-07-13 19:46:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:46:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:12,435 INFO L225 Difference]: With dead ends: 1000 [2021-07-13 19:46:12,435 INFO L226 Difference]: Without dead ends: 881 [2021-07-13 19:46:12,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 827.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:46:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-13 19:46:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 434. [2021-07-13 19:46:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.0600461893764432) internal successors, (1325), 433 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1325 transitions. [2021-07-13 19:46:12,442 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1325 transitions. Word has length 21 [2021-07-13 19:46:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:12,442 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1325 transitions. [2021-07-13 19:46:12,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1325 transitions. [2021-07-13 19:46:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:12,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:12,442 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:12,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5106,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:12,643 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1023573397, now seen corresponding path program 3 times [2021-07-13 19:46:12,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:12,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181298548] [2021-07-13 19:46:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:12,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181298548] [2021-07-13 19:46:12,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181298548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240673604] [2021-07-13 19:46:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:12,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:12,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:12,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:12,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:12,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:12,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:12,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:12,957 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:12,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:12,997 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-13 19:46:12,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:12,998 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-07-13 19:46:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:13,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240673604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:13,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:13,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:13,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478667428] [2021-07-13 19:46:13,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:13,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:13,070 INFO L87 Difference]: Start difference. First operand 434 states and 1325 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:14,732 INFO L93 Difference]: Finished difference Result 1044 states and 2937 transitions. [2021-07-13 19:46:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:46:14,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:14,733 INFO L225 Difference]: With dead ends: 1044 [2021-07-13 19:46:14,733 INFO L226 Difference]: Without dead ends: 878 [2021-07-13 19:46:14,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1160.0ms TimeCoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:46:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-13 19:46:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 436. [2021-07-13 19:46:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.0965517241379312) internal successors, (1347), 435 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1347 transitions. [2021-07-13 19:46:14,740 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1347 transitions. Word has length 21 [2021-07-13 19:46:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:14,740 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1347 transitions. [2021-07-13 19:46:14,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1347 transitions. [2021-07-13 19:46:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:14,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:14,741 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:14,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5113 [2021-07-13 19:46:14,941 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash -127683961, now seen corresponding path program 4 times [2021-07-13 19:46:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:14,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77333328] [2021-07-13 19:46:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:15,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77333328] [2021-07-13 19:46:15,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77333328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79246101] [2021-07-13 19:46:15,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:15,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:15,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:15,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:15,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:15,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:15,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:15,236 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-13 19:46:15,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:15,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-13 19:46:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:15,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79246101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:15,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:15,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432358841] [2021-07-13 19:46:15,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:15,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:15,275 INFO L87 Difference]: Start difference. First operand 436 states and 1347 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:16,402 INFO L93 Difference]: Finished difference Result 887 states and 2629 transitions. [2021-07-13 19:46:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:46:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:16,403 INFO L225 Difference]: With dead ends: 887 [2021-07-13 19:46:16,403 INFO L226 Difference]: Without dead ends: 768 [2021-07-13 19:46:16,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:46:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-07-13 19:46:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-07-13 19:46:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.128755364806867) internal successors, (1458), 466 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-07-13 19:46:16,410 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-07-13 19:46:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:16,410 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-07-13 19:46:16,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-07-13 19:46:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:16,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:16,411 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:16,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-07-13 19:46:16,611 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash 580674257, now seen corresponding path program 5 times [2021-07-13 19:46:16,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:16,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924222258] [2021-07-13 19:46:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:16,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:16,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924222258] [2021-07-13 19:46:16,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924222258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:16,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817541707] [2021-07-13 19:46:16,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:16,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:16,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:16,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:16,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:16,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:16,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:16,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:16,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:16,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:16,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:16,931 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:46:16,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:16,932 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:46:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:17,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817541707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:17,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:17,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234723041] [2021-07-13 19:46:17,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:17,008 INFO L87 Difference]: Start difference. First operand 467 states and 1458 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:18,513 INFO L93 Difference]: Finished difference Result 1114 states and 3228 transitions. [2021-07-13 19:46:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:46:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:18,515 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:46:18,515 INFO L226 Difference]: Without dead ends: 953 [2021-07-13 19:46:18,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:46:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-13 19:46:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 450. [2021-07-13 19:46:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.111358574610245) internal successors, (1397), 449 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1397 transitions. [2021-07-13 19:46:18,522 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1397 transitions. Word has length 21 [2021-07-13 19:46:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:18,522 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1397 transitions. [2021-07-13 19:46:18,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1397 transitions. [2021-07-13 19:46:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:18,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:18,523 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:18,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5127 [2021-07-13 19:46:18,723 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1526109863, now seen corresponding path program 6 times [2021-07-13 19:46:18,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:18,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401441167] [2021-07-13 19:46:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:18,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401441167] [2021-07-13 19:46:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401441167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:18,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136941992] [2021-07-13 19:46:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:18,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:19,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:19,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:19,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:19,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:19,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:19,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:19,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:19,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:19,078 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:46:19,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:19,079 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:46:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:19,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136941992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:19,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:19,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:19,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535510440] [2021-07-13 19:46:19,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:19,152 INFO L87 Difference]: Start difference. First operand 450 states and 1397 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:20,734 INFO L93 Difference]: Finished difference Result 983 states and 2836 transitions. [2021-07-13 19:46:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:46:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:20,735 INFO L225 Difference]: With dead ends: 983 [2021-07-13 19:46:20,736 INFO L226 Difference]: Without dead ends: 790 [2021-07-13 19:46:20,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1128.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:46:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-07-13 19:46:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 456. [2021-07-13 19:46:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1406593406593406) internal successors, (1429), 455 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1429 transitions. [2021-07-13 19:46:20,742 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1429 transitions. Word has length 21 [2021-07-13 19:46:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:20,742 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1429 transitions. [2021-07-13 19:46:20,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1429 transitions. [2021-07-13 19:46:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:20,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:20,743 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:20,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:20,943 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1817626865, now seen corresponding path program 7 times [2021-07-13 19:46:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:20,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394263206] [2021-07-13 19:46:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:21,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394263206] [2021-07-13 19:46:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394263206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788591359] [2021-07-13 19:46:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:21,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:21,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:21,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:21,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:21,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:21,240 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-13 19:46:21,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:21,241 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-13 19:46:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788591359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032272624] [2021-07-13 19:46:21,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:21,285 INFO L87 Difference]: Start difference. First operand 456 states and 1429 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:22,476 INFO L93 Difference]: Finished difference Result 962 states and 2828 transitions. [2021-07-13 19:46:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:46:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:22,478 INFO L225 Difference]: With dead ends: 962 [2021-07-13 19:46:22,478 INFO L226 Difference]: Without dead ends: 843 [2021-07-13 19:46:22,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 722.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:46:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-07-13 19:46:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2021-07-13 19:46:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.149159663865546) internal successors, (1499), 476 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-07-13 19:46:22,485 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-07-13 19:46:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:22,485 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-07-13 19:46:22,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-07-13 19:46:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:22,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:22,485 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:22,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5144 [2021-07-13 19:46:22,686 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1109268647, now seen corresponding path program 8 times [2021-07-13 19:46:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:22,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341954970] [2021-07-13 19:46:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:22,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341954970] [2021-07-13 19:46:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341954970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425876668] [2021-07-13 19:46:22,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:22,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:22,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:22,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:22,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:22,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:22,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:22,967 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:22,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:22,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:22,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:23,011 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:46:23,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:23,012 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:46:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:23,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425876668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:23,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:23,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611232111] [2021-07-13 19:46:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:23,085 INFO L87 Difference]: Start difference. First operand 477 states and 1499 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:24,460 INFO L93 Difference]: Finished difference Result 1189 states and 3427 transitions. [2021-07-13 19:46:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:46:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:24,462 INFO L225 Difference]: With dead ends: 1189 [2021-07-13 19:46:24,462 INFO L226 Difference]: Without dead ends: 1028 [2021-07-13 19:46:24,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:46:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-13 19:46:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 460. [2021-07-13 19:46:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.132897603485839) internal successors, (1438), 459 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1438 transitions. [2021-07-13 19:46:24,470 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1438 transitions. Word has length 21 [2021-07-13 19:46:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:24,470 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1438 transitions. [2021-07-13 19:46:24,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1438 transitions. [2021-07-13 19:46:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:24,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:24,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:24,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5151,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:24,679 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1078914529, now seen corresponding path program 9 times [2021-07-13 19:46:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:24,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032766038] [2021-07-13 19:46:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:24,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032766038] [2021-07-13 19:46:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032766038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742088983] [2021-07-13 19:46:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:24,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:46:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:24,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:24,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:24,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:46:24,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:25,016 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-07-13 19:46:25,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:25,017 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-07-13 19:46:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:46:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742088983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:25,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:25,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-13 19:46:25,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657992218] [2021-07-13 19:46:25,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:25,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:25,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:25,069 INFO L87 Difference]: Start difference. First operand 460 states and 1438 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:26,087 INFO L93 Difference]: Finished difference Result 758 states and 2219 transitions. [2021-07-13 19:46:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:26,088 INFO L225 Difference]: With dead ends: 758 [2021-07-13 19:46:26,088 INFO L226 Difference]: Without dead ends: 618 [2021-07-13 19:46:26,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-07-13 19:46:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 472. [2021-07-13 19:46:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1146496815286624) internal successors, (1467), 471 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1467 transitions. [2021-07-13 19:46:26,094 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1467 transitions. Word has length 21 [2021-07-13 19:46:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:26,094 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1467 transitions. [2021-07-13 19:46:26,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1467 transitions. [2021-07-13 19:46:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:26,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:26,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:26,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-07-13 19:46:26,296 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1157086666, now seen corresponding path program 588 times [2021-07-13 19:46:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:26,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365106722] [2021-07-13 19:46:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:26,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365106722] [2021-07-13 19:46:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365106722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327250360] [2021-07-13 19:46:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:26,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:26,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:46:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:26,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:26,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:46:26,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:26,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:26,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:26,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:26,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:26,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:26,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:46:26,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:26,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:46:26,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:27,006 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-07-13 19:46:27,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:27,007 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-07-13 19:46:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:27,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327250360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:27,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:27,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:46:27,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225572376] [2021-07-13 19:46:27,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:27,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:27,096 INFO L87 Difference]: Start difference. First operand 472 states and 1467 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,455 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-07-13 19:46:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:27,858 INFO L93 Difference]: Finished difference Result 764 states and 2359 transitions. [2021-07-13 19:46:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:27,859 INFO L225 Difference]: With dead ends: 764 [2021-07-13 19:46:27,860 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 19:46:27,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 19:46:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 490. [2021-07-13 19:46:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.147239263803681) internal successors, (1539), 489 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1539 transitions. [2021-07-13 19:46:27,866 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1539 transitions. Word has length 21 [2021-07-13 19:46:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:27,866 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1539 transitions. [2021-07-13 19:46:27,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1539 transitions. [2021-07-13 19:46:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:27,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:27,867 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:28,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5171 [2021-07-13 19:46:28,067 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401856, now seen corresponding path program 589 times [2021-07-13 19:46:28,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:28,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917059510] [2021-07-13 19:46:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917059510] [2021-07-13 19:46:28,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917059510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978924202] [2021-07-13 19:46:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:46:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:28,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:46:28,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:28,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:28,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:46:28,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:28,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:28,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:28,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:28,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:28,823 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-07-13 19:46:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978924202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:28,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:46:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236608074] [2021-07-13 19:46:28,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:28,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:28,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:28,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:28,958 INFO L87 Difference]: Start difference. First operand 490 states and 1539 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,168 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 19:46:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:30,127 INFO L93 Difference]: Finished difference Result 834 states and 2548 transitions. [2021-07-13 19:46:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:46:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:30,128 INFO L225 Difference]: With dead ends: 834 [2021-07-13 19:46:30,128 INFO L226 Difference]: Without dead ends: 765 [2021-07-13 19:46:30,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1086.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-07-13 19:46:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 497. [2021-07-13 19:46:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.163306451612903) internal successors, (1569), 496 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1569 transitions. [2021-07-13 19:46:30,135 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1569 transitions. Word has length 21 [2021-07-13 19:46:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:30,135 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1569 transitions. [2021-07-13 19:46:30,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1569 transitions. [2021-07-13 19:46:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:30,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:30,136 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:30,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-07-13 19:46:30,336 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -777988342, now seen corresponding path program 590 times [2021-07-13 19:46:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:30,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086556814] [2021-07-13 19:46:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:30,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:30,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086556814] [2021-07-13 19:46:30,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086556814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:30,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377872217] [2021-07-13 19:46:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:30,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:30,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:46:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:30,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:30,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:46:30,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:46:31,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:46:31,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:31,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:31,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:46:31,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:31,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:46:31,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:31,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:46:31,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:31,200 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-13 19:46:31,201 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-07-13 19:46:31,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:46:31,203 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-07-13 19:46:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:31,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377872217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:31,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:31,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:46:31,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388373514] [2021-07-13 19:46:31,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:31,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:31,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:31,419 INFO L87 Difference]: Start difference. First operand 497 states and 1569 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:31,999 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 19:46:32,204 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-13 19:46:32,411 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-13 19:46:32,604 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-07-13 19:46:32,798 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 19:46:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:32,873 INFO L93 Difference]: Finished difference Result 823 states and 2486 transitions. [2021-07-13 19:46:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:32,875 INFO L225 Difference]: With dead ends: 823 [2021-07-13 19:46:32,875 INFO L226 Difference]: Without dead ends: 729 [2021-07-13 19:46:32,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1476.6ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-07-13 19:46:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 482. [2021-07-13 19:46:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.126819126819127) internal successors, (1504), 481 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1504 transitions. [2021-07-13 19:46:32,882 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1504 transitions. Word has length 21 [2021-07-13 19:46:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:32,882 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1504 transitions. [2021-07-13 19:46:32,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1504 transitions. [2021-07-13 19:46:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:32,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:32,882 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:33,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5274,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,083 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1120947862, now seen corresponding path program 591 times [2021-07-13 19:46:33,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:33,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519833630] [2021-07-13 19:46:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:33,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:33,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519833630] [2021-07-13 19:46:33,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519833630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:33,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85322515] [2021-07-13 19:46:33,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:33,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:33,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:46:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:46:33,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:33,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:33,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:33,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:46:33,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:33,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:46:33,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:33,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:33,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:33,753 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.2 percent of original size [2021-07-13 19:46:33,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:33,755 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-07-13 19:46:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85322515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:46:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938428857] [2021-07-13 19:46:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:33,843 INFO L87 Difference]: Start difference. First operand 482 states and 1504 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:34,494 INFO L93 Difference]: Finished difference Result 767 states and 2356 transitions. [2021-07-13 19:46:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:34,496 INFO L225 Difference]: With dead ends: 767 [2021-07-13 19:46:34,496 INFO L226 Difference]: Without dead ends: 720 [2021-07-13 19:46:34,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-13 19:46:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 498. [2021-07-13 19:46:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.1569416498993963) internal successors, (1569), 497 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1569 transitions. [2021-07-13 19:46:34,503 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1569 transitions. Word has length 21 [2021-07-13 19:46:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:34,503 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1569 transitions. [2021-07-13 19:46:34,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1569 transitions. [2021-07-13 19:46:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:34,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:34,504 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:34,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5349 [2021-07-13 19:46:34,704 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash 697629236, now seen corresponding path program 592 times [2021-07-13 19:46:34,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:34,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886257695] [2021-07-13 19:46:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:34,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:34,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886257695] [2021-07-13 19:46:34,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886257695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:34,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687522216] [2021-07-13 19:46:34,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:34,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:46:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:35,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:35,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:46:35,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:35,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:46:35,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:35,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:46:35,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:35,349 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:35,357 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:35,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:35,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:35,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:35,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:35,422 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-13 19:46:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687522216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:35,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:35,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:46:35,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091295906] [2021-07-13 19:46:35,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:35,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:35,637 INFO L87 Difference]: Start difference. First operand 498 states and 1569 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,529 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 19:46:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:36,722 INFO L93 Difference]: Finished difference Result 811 states and 2461 transitions. [2021-07-13 19:46:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:36,723 INFO L225 Difference]: With dead ends: 811 [2021-07-13 19:46:36,723 INFO L226 Difference]: Without dead ends: 742 [2021-07-13 19:46:36,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1094.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-13 19:46:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 491. [2021-07-13 19:46:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1408163265306124) internal successors, (1539), 490 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1539 transitions. [2021-07-13 19:46:36,730 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1539 transitions. Word has length 21 [2021-07-13 19:46:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:36,730 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1539 transitions. [2021-07-13 19:46:36,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1539 transitions. [2021-07-13 19:46:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:36,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:36,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:36,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5391,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:36,931 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash -363148854, now seen corresponding path program 593 times [2021-07-13 19:46:36,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:36,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788639682] [2021-07-13 19:46:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:37,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788639682] [2021-07-13 19:46:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788639682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141696658] [2021-07-13 19:46:37,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:37,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:46:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:37,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:46:37,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:37,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:46:37,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:37,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:37,573 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:46:37,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:46:37,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:37,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:46:37,599 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:37,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:37,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:37,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:37,615 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:37,620 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:37,624 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:37,712 INFO L628 ElimStorePlain]: treesize reduction 146, result has 41.1 percent of original size [2021-07-13 19:46:37,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:37,713 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:677, output treesize:70 [2021-07-13 19:46:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:37,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141696658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:37,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:37,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:46:37,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132963762] [2021-07-13 19:46:37,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:37,892 INFO L87 Difference]: Start difference. First operand 491 states and 1539 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,707 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-13 19:46:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:38,906 INFO L93 Difference]: Finished difference Result 931 states and 2746 transitions. [2021-07-13 19:46:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:38,908 INFO L225 Difference]: With dead ends: 931 [2021-07-13 19:46:38,908 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 19:46:38,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 19:46:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 515. [2021-07-13 19:46:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.2023346303501947) internal successors, (1646), 514 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1646 transitions. [2021-07-13 19:46:38,915 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1646 transitions. Word has length 21 [2021-07-13 19:46:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:38,915 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1646 transitions. [2021-07-13 19:46:38,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1646 transitions. [2021-07-13 19:46:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:38,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:38,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:39,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5465 [2021-07-13 19:46:39,117 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1269902538, now seen corresponding path program 594 times [2021-07-13 19:46:39,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:39,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464452181] [2021-07-13 19:46:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464452181] [2021-07-13 19:46:39,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464452181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33197873] [2021-07-13 19:46:39,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:39,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:46:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:39,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:39,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:39,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:46:39,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:39,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:39,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:46:39,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:46:39,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:39,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:39,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:39,548 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:39,551 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:39,611 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.8 percent of original size [2021-07-13 19:46:39,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:39,612 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-07-13 19:46:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33197873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:39,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-13 19:46:39,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569868794] [2021-07-13 19:46:39,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:46:39,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:46:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:39,749 INFO L87 Difference]: Start difference. First operand 515 states and 1646 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,154 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-13 19:46:40,323 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 19:46:40,471 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 19:46:40,632 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-13 19:46:40,780 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 19:46:40,948 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-13 19:46:41,087 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-13 19:46:41,378 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 19:46:41,521 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-13 19:46:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:41,529 INFO L93 Difference]: Finished difference Result 1021 states and 2942 transitions. [2021-07-13 19:46:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:46:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:41,531 INFO L225 Difference]: With dead ends: 1021 [2021-07-13 19:46:41,531 INFO L226 Difference]: Without dead ends: 915 [2021-07-13 19:46:41,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1730.8ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:46:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-07-13 19:46:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 510. [2021-07-13 19:46:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.180746561886051) internal successors, (1619), 509 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1619 transitions. [2021-07-13 19:46:41,539 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1619 transitions. Word has length 21 [2021-07-13 19:46:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:41,539 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1619 transitions. [2021-07-13 19:46:41,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1619 transitions. [2021-07-13 19:46:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:41,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:41,540 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:41,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:41,740 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1917789974, now seen corresponding path program 595 times [2021-07-13 19:46:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125241979] [2021-07-13 19:46:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:41,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:41,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125241979] [2021-07-13 19:46:41,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125241979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:41,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293070564] [2021-07-13 19:46:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:46:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:42,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:42,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:46:42,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:42,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:42,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:42,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:42,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:42,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:42,214 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-07-13 19:46:42,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:42,214 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-07-13 19:46:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:42,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293070564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:42,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:42,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-13 19:46:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563430723] [2021-07-13 19:46:42,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:46:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:46:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:42,279 INFO L87 Difference]: Start difference. First operand 510 states and 1619 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:43,080 INFO L93 Difference]: Finished difference Result 875 states and 2605 transitions. [2021-07-13 19:46:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:43,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:43,082 INFO L225 Difference]: With dead ends: 875 [2021-07-13 19:46:43,082 INFO L226 Difference]: Without dead ends: 806 [2021-07-13 19:46:43,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:46:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-07-13 19:46:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 514. [2021-07-13 19:46:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1832358674463936) internal successors, (1633), 513 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1633 transitions. [2021-07-13 19:46:43,089 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1633 transitions. Word has length 21 [2021-07-13 19:46:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1633 transitions. [2021-07-13 19:46:43,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1633 transitions. [2021-07-13 19:46:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:43,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:43,090 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:43,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5598,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:43,290 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1093182143, now seen corresponding path program 10 times [2021-07-13 19:46:43,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:43,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852492202] [2021-07-13 19:46:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:43,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852492202] [2021-07-13 19:46:43,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852492202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964082016] [2021-07-13 19:46:43,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:43,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:43,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:43,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:43,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:43,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:43,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:43,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:43,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:43,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:43,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:43,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:43,629 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-13 19:46:43,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:43,630 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-13 19:46:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964082016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:43,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618109116] [2021-07-13 19:46:43,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:43,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:43,706 INFO L87 Difference]: Start difference. First operand 514 states and 1633 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,218 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:46:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:45,722 INFO L93 Difference]: Finished difference Result 1303 states and 3840 transitions. [2021-07-13 19:46:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:46:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:45,724 INFO L225 Difference]: With dead ends: 1303 [2021-07-13 19:46:45,724 INFO L226 Difference]: Without dead ends: 1100 [2021-07-13 19:46:45,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1591.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:46:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-07-13 19:46:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 554. [2021-07-13 19:46:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2278481012658227) internal successors, (1785), 553 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-07-13 19:46:45,733 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-07-13 19:46:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:45,733 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-07-13 19:46:45,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-07-13 19:46:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:45,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:45,733 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:45,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:45,934 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1361928571, now seen corresponding path program 11 times [2021-07-13 19:46:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:45,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946592576] [2021-07-13 19:46:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:46,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:46,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946592576] [2021-07-13 19:46:46,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946592576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:46,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491101304] [2021-07-13 19:46:46,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:46,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:46,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:46:46,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:46,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:46,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:46,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:46,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:46,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:46,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:46,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:46,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:46,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:46,269 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-13 19:46:46,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:46,270 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-13 19:46:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491101304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:46,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:46,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:46,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648851443] [2021-07-13 19:46:46,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:46,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:46,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:46,354 INFO L87 Difference]: Start difference. First operand 554 states and 1785 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,464 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-13 19:46:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:47,827 INFO L93 Difference]: Finished difference Result 1175 states and 3509 transitions. [2021-07-13 19:46:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:46:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:47,829 INFO L225 Difference]: With dead ends: 1175 [2021-07-13 19:46:47,829 INFO L226 Difference]: Without dead ends: 1007 [2021-07-13 19:46:47,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:46:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-07-13 19:46:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 554. [2021-07-13 19:46:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2278481012658227) internal successors, (1785), 553 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-07-13 19:46:47,837 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-07-13 19:46:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:47,837 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-07-13 19:46:47,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-07-13 19:46:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:47,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:47,838 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:48,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5620,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:48,039 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1696858245, now seen corresponding path program 12 times [2021-07-13 19:46:48,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:48,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140334474] [2021-07-13 19:46:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140334474] [2021-07-13 19:46:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140334474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582286281] [2021-07-13 19:46:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:48,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:48,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:48,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:48,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:48,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:48,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:48,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:48,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:48,415 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-13 19:46:48,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:48,416 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-13 19:46:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582286281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:48,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:48,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102506001] [2021-07-13 19:46:48,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:48,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:48,493 INFO L87 Difference]: Start difference. First operand 554 states and 1785 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:50,427 INFO L93 Difference]: Finished difference Result 1201 states and 3525 transitions. [2021-07-13 19:46:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:46:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:50,429 INFO L225 Difference]: With dead ends: 1201 [2021-07-13 19:46:50,430 INFO L226 Difference]: Without dead ends: 1009 [2021-07-13 19:46:50,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1479.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:46:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-13 19:46:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 561. [2021-07-13 19:46:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.2160714285714285) internal successors, (1801), 560 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1801 transitions. [2021-07-13 19:46:50,438 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1801 transitions. Word has length 21 [2021-07-13 19:46:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:50,439 INFO L482 AbstractCegarLoop]: Abstraction has 561 states and 1801 transitions. [2021-07-13 19:46:50,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1801 transitions. [2021-07-13 19:46:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:50,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:50,439 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:50,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:50,640 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 219055557, now seen corresponding path program 13 times [2021-07-13 19:46:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:50,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783164456] [2021-07-13 19:46:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:50,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:50,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783164456] [2021-07-13 19:46:50,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783164456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:50,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622127883] [2021-07-13 19:46:50,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622127883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:51,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:51,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34607374] [2021-07-13 19:46:51,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:51,002 INFO L87 Difference]: Start difference. First operand 561 states and 1801 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:52,545 INFO L93 Difference]: Finished difference Result 1086 states and 3218 transitions. [2021-07-13 19:46:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:46:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:52,547 INFO L225 Difference]: With dead ends: 1086 [2021-07-13 19:46:52,547 INFO L226 Difference]: Without dead ends: 857 [2021-07-13 19:46:52,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1240.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:46:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-13 19:46:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 564. [2021-07-13 19:46:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.202486678507993) internal successors, (1803), 563 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1803 transitions. [2021-07-13 19:46:52,555 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1803 transitions. Word has length 21 [2021-07-13 19:46:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:52,555 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1803 transitions. [2021-07-13 19:46:52,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1803 transitions. [2021-07-13 19:46:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:52,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:52,556 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:52,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:52,757 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1157506963, now seen corresponding path program 14 times [2021-07-13 19:46:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:52,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278482280] [2021-07-13 19:46:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:52,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278482280] [2021-07-13 19:46:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278482280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612159013] [2021-07-13 19:46:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:52,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:53,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:53,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:53,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:53,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:53,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:53,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:53,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:53,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:53,096 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-13 19:46:53,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:53,096 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-13 19:46:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:53,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612159013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:53,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:53,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:53,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229288521] [2021-07-13 19:46:53,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:53,181 INFO L87 Difference]: Start difference. First operand 564 states and 1803 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:54,642 INFO L93 Difference]: Finished difference Result 1381 states and 4019 transitions. [2021-07-13 19:46:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:46:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:54,644 INFO L225 Difference]: With dead ends: 1381 [2021-07-13 19:46:54,645 INFO L226 Difference]: Without dead ends: 1147 [2021-07-13 19:46:54,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:46:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-07-13 19:46:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2021-07-13 19:46:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.2189141856392296) internal successors, (1838), 571 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1838 transitions. [2021-07-13 19:46:54,655 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1838 transitions. Word has length 21 [2021-07-13 19:46:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:54,655 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1838 transitions. [2021-07-13 19:46:54,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1838 transitions. [2021-07-13 19:46:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:54,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:54,656 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:54,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5646 [2021-07-13 19:46:54,869 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:54,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash -171190457, now seen corresponding path program 15 times [2021-07-13 19:46:54,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:54,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710174488] [2021-07-13 19:46:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:54,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710174488] [2021-07-13 19:46:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710174488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30133448] [2021-07-13 19:46:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:55,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:46:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:55,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:55,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:55,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:55,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:55,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:55,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:55,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:55,263 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-07-13 19:46:55,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:55,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:84, output treesize:41 [2021-07-13 19:46:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:46:55,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30133448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:55,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:55,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-13 19:46:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487449517] [2021-07-13 19:46:55,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:55,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:55,338 INFO L87 Difference]: Start difference. First operand 572 states and 1838 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:55,862 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 19:46:55,987 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-13 19:46:56,310 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 19:46:56,714 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 19:46:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:57,177 INFO L93 Difference]: Finished difference Result 1101 states and 3236 transitions. [2021-07-13 19:46:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:46:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:57,179 INFO L225 Difference]: With dead ends: 1101 [2021-07-13 19:46:57,179 INFO L226 Difference]: Without dead ends: 897 [2021-07-13 19:46:57,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1726.7ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:46:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-13 19:46:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 575. [2021-07-13 19:46:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.224738675958188) internal successors, (1851), 574 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1851 transitions. [2021-07-13 19:46:57,188 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1851 transitions. Word has length 21 [2021-07-13 19:46:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:57,188 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1851 transitions. [2021-07-13 19:46:57,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1851 transitions. [2021-07-13 19:46:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:57,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:57,189 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5653,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:57,389 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 586681167, now seen corresponding path program 16 times [2021-07-13 19:46:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309517453] [2021-07-13 19:46:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:57,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309517453] [2021-07-13 19:46:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309517453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383871061] [2021-07-13 19:46:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:57,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:57,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:57,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:57,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:57,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:57,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:46:57,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:46:57,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:46:57,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:57,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:57,733 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:46:57,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:46:57,734 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:46:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383871061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:57,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:57,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:46:57,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005046845] [2021-07-13 19:46:57,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:57,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:57,821 INFO L87 Difference]: Start difference. First operand 575 states and 1851 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,124 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-13 19:46:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:59,716 INFO L93 Difference]: Finished difference Result 1407 states and 4127 transitions. [2021-07-13 19:46:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:46:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:46:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:59,718 INFO L225 Difference]: With dead ends: 1407 [2021-07-13 19:46:59,719 INFO L226 Difference]: Without dead ends: 1183 [2021-07-13 19:46:59,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:46:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-13 19:46:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 569. [2021-07-13 19:46:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.23943661971831) internal successors, (1840), 568 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1840 transitions. [2021-07-13 19:46:59,727 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1840 transitions. Word has length 21 [2021-07-13 19:46:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:59,727 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1840 transitions. [2021-07-13 19:46:59,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1840 transitions. [2021-07-13 19:46:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:46:59,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:59,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:59,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5665,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:59,929 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2080518403, now seen corresponding path program 17 times [2021-07-13 19:46:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:59,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188449397] [2021-07-13 19:46:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:00,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188449397] [2021-07-13 19:47:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188449397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484560368] [2021-07-13 19:47:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:00,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:47:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:00,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:00,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:00,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:00,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:00,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:00,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:00,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:00,287 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:47:00,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:00,288 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:47:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484560368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776032455] [2021-07-13 19:47:00,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:00,362 INFO L87 Difference]: Start difference. First operand 569 states and 1840 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:02,270 INFO L93 Difference]: Finished difference Result 1420 states and 4101 transitions. [2021-07-13 19:47:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:47:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:02,273 INFO L225 Difference]: With dead ends: 1420 [2021-07-13 19:47:02,273 INFO L226 Difference]: Without dead ends: 1201 [2021-07-13 19:47:02,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1499.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:47:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-13 19:47:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 569. [2021-07-13 19:47:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.227112676056338) internal successors, (1833), 568 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1833 transitions. [2021-07-13 19:47:02,288 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1833 transitions. Word has length 21 [2021-07-13 19:47:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:02,288 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1833 transitions. [2021-07-13 19:47:02,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1833 transitions. [2021-07-13 19:47:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:02,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:02,289 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:02,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5674 [2021-07-13 19:47:02,489 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 736646205, now seen corresponding path program 18 times [2021-07-13 19:47:02,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:02,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517945234] [2021-07-13 19:47:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:02,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:02,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517945234] [2021-07-13 19:47:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517945234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:02,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719296883] [2021-07-13 19:47:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:02,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:02,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719296883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:02,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:02,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:02,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556183550] [2021-07-13 19:47:02,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:02,841 INFO L87 Difference]: Start difference. First operand 569 states and 1833 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:04,787 INFO L93 Difference]: Finished difference Result 1407 states and 4062 transitions. [2021-07-13 19:47:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:47:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:04,789 INFO L225 Difference]: With dead ends: 1407 [2021-07-13 19:47:04,790 INFO L226 Difference]: Without dead ends: 1151 [2021-07-13 19:47:04,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1432.8ms TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:47:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-07-13 19:47:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 547. [2021-07-13 19:47:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.1941391941391943) internal successors, (1744), 546 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1744 transitions. [2021-07-13 19:47:04,798 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1744 transitions. Word has length 21 [2021-07-13 19:47:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:04,799 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1744 transitions. [2021-07-13 19:47:04,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1744 transitions. [2021-07-13 19:47:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:04,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:04,799 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:05,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:05,000 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 648620313, now seen corresponding path program 19 times [2021-07-13 19:47:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:05,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12817310] [2021-07-13 19:47:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12817310] [2021-07-13 19:47:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12817310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008815231] [2021-07-13 19:47:05,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:05,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:05,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:05,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:05,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:05,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:05,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:05,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:05,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:05,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:05,368 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-13 19:47:05,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:05,369 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-13 19:47:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008815231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:05,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244451307] [2021-07-13 19:47:05,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:05,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:05,453 INFO L87 Difference]: Start difference. First operand 547 states and 1744 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,092 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 19:47:07,327 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 19:47:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:08,620 INFO L93 Difference]: Finished difference Result 1838 states and 5319 transitions. [2021-07-13 19:47:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:47:08,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:08,623 INFO L225 Difference]: With dead ends: 1838 [2021-07-13 19:47:08,623 INFO L226 Difference]: Without dead ends: 1526 [2021-07-13 19:47:08,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2540.4ms TimeCoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:47:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-13 19:47:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 589. [2021-07-13 19:47:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-07-13 19:47:08,635 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-07-13 19:47:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:08,635 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-07-13 19:47:08,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-07-13 19:47:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:08,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:08,636 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:08,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:08,836 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1068180589, now seen corresponding path program 20 times [2021-07-13 19:47:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:08,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934309702] [2021-07-13 19:47:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:08,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934309702] [2021-07-13 19:47:08,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934309702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406431295] [2021-07-13 19:47:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:09,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:09,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:09,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:09,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:09,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:09,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:09,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:09,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:09,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:09,219 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:47:09,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:09,220 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:47:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:09,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406431295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:09,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:09,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:09,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5286187] [2021-07-13 19:47:09,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:09,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:09,303 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,985 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 19:47:10,499 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-07-13 19:47:10,729 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-13 19:47:11,101 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-13 19:47:11,283 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-13 19:47:11,409 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-13 19:47:11,872 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-07-13 19:47:12,033 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-13 19:47:12,275 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 19:47:12,460 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-13 19:47:13,097 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 19:47:13,702 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-13 19:47:13,899 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 19:47:14,053 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-13 19:47:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:14,069 INFO L93 Difference]: Finished difference Result 1916 states and 5539 transitions. [2021-07-13 19:47:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:47:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:14,072 INFO L225 Difference]: With dead ends: 1916 [2021-07-13 19:47:14,072 INFO L226 Difference]: Without dead ends: 1653 [2021-07-13 19:47:14,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4048.8ms TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:47:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-07-13 19:47:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 583. [2021-07-13 19:47:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.238831615120275) internal successors, (1885), 582 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1885 transitions. [2021-07-13 19:47:14,083 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1885 transitions. Word has length 21 [2021-07-13 19:47:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:14,083 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1885 transitions. [2021-07-13 19:47:14,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1885 transitions. [2021-07-13 19:47:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:14,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:14,084 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:14,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,285 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1985017005, now seen corresponding path program 21 times [2021-07-13 19:47:14,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559940393] [2021-07-13 19:47:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:14,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559940393] [2021-07-13 19:47:14,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559940393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002404698] [2021-07-13 19:47:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002404698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:14,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:14,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328105336] [2021-07-13 19:47:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:14,688 INFO L87 Difference]: Start difference. First operand 583 states and 1885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,269 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-13 19:47:15,728 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-13 19:47:17,292 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-07-13 19:47:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:17,417 INFO L93 Difference]: Finished difference Result 1743 states and 5017 transitions. [2021-07-13 19:47:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:47:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:17,420 INFO L225 Difference]: With dead ends: 1743 [2021-07-13 19:47:17,420 INFO L226 Difference]: Without dead ends: 1466 [2021-07-13 19:47:17,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2196.6ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:47:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-07-13 19:47:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 573. [2021-07-13 19:47:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.222027972027972) internal successors, (1843), 572 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1843 transitions. [2021-07-13 19:47:17,433 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1843 transitions. Word has length 21 [2021-07-13 19:47:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:17,433 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1843 transitions. [2021-07-13 19:47:17,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1843 transitions. [2021-07-13 19:47:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:17,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:17,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:17,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5711 [2021-07-13 19:47:17,635 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 596 times [2021-07-13 19:47:17,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:17,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680285507] [2021-07-13 19:47:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:17,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680285507] [2021-07-13 19:47:17,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680285507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14948149] [2021-07-13 19:47:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:17,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:47:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:18,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:47:18,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:18,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:47:18,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:18,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:47:18,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:18,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:18,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:18,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:18,315 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-07-13 19:47:18,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:18,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-07-13 19:47:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:18,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14948149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:18,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:18,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:47:18,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822044533] [2021-07-13 19:47:18,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:18,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:18,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:18,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:18,409 INFO L87 Difference]: Start difference. First operand 573 states and 1843 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:18,763 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-07-13 19:47:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:19,168 INFO L93 Difference]: Finished difference Result 796 states and 2524 transitions. [2021-07-13 19:47:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:19,169 INFO L225 Difference]: With dead ends: 796 [2021-07-13 19:47:19,170 INFO L226 Difference]: Without dead ends: 749 [2021-07-13 19:47:19,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 678.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:47:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-13 19:47:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 612. [2021-07-13 19:47:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.243862520458265) internal successors, (1982), 611 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1982 transitions. [2021-07-13 19:47:19,177 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1982 transitions. Word has length 21 [2021-07-13 19:47:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:19,177 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1982 transitions. [2021-07-13 19:47:19,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1982 transitions. [2021-07-13 19:47:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:19,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:19,178 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:19,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5717,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:19,378 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 597 times [2021-07-13 19:47:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:19,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956438947] [2021-07-13 19:47:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:19,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956438947] [2021-07-13 19:47:19,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956438947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7265152] [2021-07-13 19:47:19,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:19,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:47:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:47:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:20,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:20,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:20,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:20,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:20,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:47:20,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:20,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:20,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:20,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:47:20,027 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:20,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:20,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:47:20,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:20,110 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-07-13 19:47:20,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:20,112 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-07-13 19:47:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:20,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7265152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:20,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:20,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:47:20,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661299265] [2021-07-13 19:47:20,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:20,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:20,203 INFO L87 Difference]: Start difference. First operand 612 states and 1982 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:20,971 INFO L93 Difference]: Finished difference Result 836 states and 2636 transitions. [2021-07-13 19:47:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:20,973 INFO L225 Difference]: With dead ends: 836 [2021-07-13 19:47:20,973 INFO L226 Difference]: Without dead ends: 789 [2021-07-13 19:47:20,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:47:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-07-13 19:47:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 619. [2021-07-13 19:47:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2540453074433655) internal successors, (2011), 618 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2011 transitions. [2021-07-13 19:47:20,980 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2011 transitions. Word has length 21 [2021-07-13 19:47:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:20,980 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2011 transitions. [2021-07-13 19:47:20,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2011 transitions. [2021-07-13 19:47:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:20,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:20,981 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:21,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5760 [2021-07-13 19:47:21,182 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 598 times [2021-07-13 19:47:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:21,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177243499] [2021-07-13 19:47:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:21,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177243499] [2021-07-13 19:47:21,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177243499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789556598] [2021-07-13 19:47:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:21,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:21,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:21,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:21,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:47:21,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:21,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:21,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:21,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:21,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:21,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:21,875 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:21,993 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 19:47:21,993 INFO L628 ElimStorePlain]: treesize reduction 34, result has 80.1 percent of original size [2021-07-13 19:47:21,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:21,995 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-13 19:47:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:22,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789556598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:22,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:22,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:22,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879311425] [2021-07-13 19:47:22,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:22,222 INFO L87 Difference]: Start difference. First operand 619 states and 2011 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,270 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 19:47:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:23,482 INFO L93 Difference]: Finished difference Result 840 states and 2630 transitions. [2021-07-13 19:47:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:23,483 INFO L225 Difference]: With dead ends: 840 [2021-07-13 19:47:23,483 INFO L226 Difference]: Without dead ends: 771 [2021-07-13 19:47:23,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1239.2ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-13 19:47:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 605. [2021-07-13 19:47:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.2334437086092715) internal successors, (1953), 604 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1953 transitions. [2021-07-13 19:47:23,490 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1953 transitions. Word has length 21 [2021-07-13 19:47:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:23,491 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1953 transitions. [2021-07-13 19:47:23,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1953 transitions. [2021-07-13 19:47:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:23,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:23,491 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:23,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:23,692 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 599 times [2021-07-13 19:47:23,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:23,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493417652] [2021-07-13 19:47:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:23,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493417652] [2021-07-13 19:47:23,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493417652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105265687] [2021-07-13 19:47:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:23,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:23,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:23,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:24,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:24,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:24,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:47:24,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:24,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:24,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:47:24,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:47:24,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:24,305 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-13 19:47:24,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:24,307 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-07-13 19:47:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:24,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105265687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:24,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:24,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:24,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098049019] [2021-07-13 19:47:24,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:24,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:24,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:24,379 INFO L87 Difference]: Start difference. First operand 605 states and 1953 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:24,775 INFO L93 Difference]: Finished difference Result 805 states and 2540 transitions. [2021-07-13 19:47:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:47:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:24,777 INFO L225 Difference]: With dead ends: 805 [2021-07-13 19:47:24,777 INFO L226 Difference]: Without dead ends: 758 [2021-07-13 19:47:24,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-13 19:47:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 626. [2021-07-13 19:47:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.256) internal successors, (2035), 625 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2035 transitions. [2021-07-13 19:47:24,785 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2035 transitions. Word has length 21 [2021-07-13 19:47:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:24,785 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 2035 transitions. [2021-07-13 19:47:24,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2035 transitions. [2021-07-13 19:47:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:24,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:24,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:24,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:24,986 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 600 times [2021-07-13 19:47:24,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:24,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321540610] [2021-07-13 19:47:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:25,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321540610] [2021-07-13 19:47:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321540610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725433624] [2021-07-13 19:47:25,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:25,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:47:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:25,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:25,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:25,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:47:25,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:25,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:25,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:47:25,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:25,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:25,799 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:47:25,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:25,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:25,815 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:25,983 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-13 19:47:25,984 INFO L628 ElimStorePlain]: treesize reduction 75, result has 71.5 percent of original size [2021-07-13 19:47:25,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:25,986 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-07-13 19:47:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725433624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032729302] [2021-07-13 19:47:26,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:26,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:26,192 INFO L87 Difference]: Start difference. First operand 626 states and 2035 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,614 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-13 19:47:26,772 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 19:47:26,929 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 19:47:27,076 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 19:47:27,221 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 19:47:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:27,279 INFO L93 Difference]: Finished difference Result 872 states and 2702 transitions. [2021-07-13 19:47:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:27,281 INFO L225 Difference]: With dead ends: 872 [2021-07-13 19:47:27,281 INFO L226 Difference]: Without dead ends: 778 [2021-07-13 19:47:27,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1136.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-07-13 19:47:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 619. [2021-07-13 19:47:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2459546925566345) internal successors, (2006), 618 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2006 transitions. [2021-07-13 19:47:27,288 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2006 transitions. Word has length 21 [2021-07-13 19:47:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:27,288 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2006 transitions. [2021-07-13 19:47:27,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2006 transitions. [2021-07-13 19:47:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:27,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:27,289 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:27,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-07-13 19:47:27,489 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:27,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 601 times [2021-07-13 19:47:27,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:27,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370935699] [2021-07-13 19:47:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:27,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:27,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370935699] [2021-07-13 19:47:27,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370935699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:27,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522632733] [2021-07-13 19:47:27,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:27,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:27,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:27,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:27,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:27,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:27,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:27,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:28,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:28,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,164 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-13 19:47:28,164 INFO L628 ElimStorePlain]: treesize reduction 114, result has 61.7 percent of original size [2021-07-13 19:47:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:28,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:28,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:28,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:28,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:28,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:28,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:28,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:28,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:28,282 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-13 19:47:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:28,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522632733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:28,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:28,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:28,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786889887] [2021-07-13 19:47:28,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:28,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:28,443 INFO L87 Difference]: Start difference. First operand 619 states and 2006 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:28,891 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-13 19:47:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:29,044 INFO L93 Difference]: Finished difference Result 957 states and 2965 transitions. [2021-07-13 19:47:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:29,046 INFO L225 Difference]: With dead ends: 957 [2021-07-13 19:47:29,046 INFO L226 Difference]: Without dead ends: 910 [2021-07-13 19:47:29,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-07-13 19:47:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 633. [2021-07-13 19:47:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.2832278481012658) internal successors, (2075), 632 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2075 transitions. [2021-07-13 19:47:29,054 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2075 transitions. Word has length 21 [2021-07-13 19:47:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:29,054 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2075 transitions. [2021-07-13 19:47:29,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2075 transitions. [2021-07-13 19:47:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:29,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:29,055 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:29,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-07-13 19:47:29,256 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash -893071312, now seen corresponding path program 602 times [2021-07-13 19:47:29,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:29,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522418942] [2021-07-13 19:47:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:29,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:29,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522418942] [2021-07-13 19:47:29,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522418942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:29,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544791937] [2021-07-13 19:47:29,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:29,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:29,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:29,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:29,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:29,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:29,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:29,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:29,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:29,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:29,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:29,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:29,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:30,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:30,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:30,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:30,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:30,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:30,027 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:30,130 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:47:30,131 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-07-13 19:47:30,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:30,133 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-13 19:47:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544791937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:30,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:30,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:30,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663309084] [2021-07-13 19:47:30,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:30,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:30,295 INFO L87 Difference]: Start difference. First operand 633 states and 2075 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:31,150 INFO L93 Difference]: Finished difference Result 925 states and 2856 transitions. [2021-07-13 19:47:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:31,152 INFO L225 Difference]: With dead ends: 925 [2021-07-13 19:47:31,152 INFO L226 Difference]: Without dead ends: 856 [2021-07-13 19:47:31,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-07-13 19:47:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 587. [2021-07-13 19:47:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.2218430034129693) internal successors, (1888), 586 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1888 transitions. [2021-07-13 19:47:31,160 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1888 transitions. Word has length 21 [2021-07-13 19:47:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1888 transitions. [2021-07-13 19:47:31,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1888 transitions. [2021-07-13 19:47:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:31,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:31,161 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:31,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-07-13 19:47:31,361 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 603 times [2021-07-13 19:47:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229581122] [2021-07-13 19:47:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:31,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229581122] [2021-07-13 19:47:31,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229581122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458167651] [2021-07-13 19:47:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:31,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:31,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:31,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:47:31,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:31,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:31,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:31,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:31,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:31,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:47:31,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:31,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:47:31,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:31,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:31,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:32,001 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-13 19:47:32,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:32,003 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-07-13 19:47:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:32,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458167651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:32,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:32,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:32,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407495699] [2021-07-13 19:47:32,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:32,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:32,077 INFO L87 Difference]: Start difference. First operand 587 states and 1888 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:32,494 INFO L93 Difference]: Finished difference Result 758 states and 2401 transitions. [2021-07-13 19:47:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:47:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:32,496 INFO L225 Difference]: With dead ends: 758 [2021-07-13 19:47:32,496 INFO L226 Difference]: Without dead ends: 711 [2021-07-13 19:47:32,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-13 19:47:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 612. [2021-07-13 19:47:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.237315875613748) internal successors, (1978), 611 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1978 transitions. [2021-07-13 19:47:32,503 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1978 transitions. Word has length 21 [2021-07-13 19:47:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:32,503 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1978 transitions. [2021-07-13 19:47:32,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1978 transitions. [2021-07-13 19:47:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:32,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:32,504 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:32,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6183,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:32,704 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 604 times [2021-07-13 19:47:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:32,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861242903] [2021-07-13 19:47:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:32,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861242903] [2021-07-13 19:47:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861242903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369790859] [2021-07-13 19:47:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:32,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:33,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:33,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:33,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:33,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:33,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:47:33,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:47:33,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:33,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:33,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:33,497 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:33,503 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:33,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:33,514 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:33,650 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-13 19:47:33,650 INFO L628 ElimStorePlain]: treesize reduction 117, result has 53.9 percent of original size [2021-07-13 19:47:33,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:33,652 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-07-13 19:47:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369790859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:33,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:33,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473310920] [2021-07-13 19:47:33,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:33,866 INFO L87 Difference]: Start difference. First operand 612 states and 1978 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,795 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-13 19:47:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:35,017 INFO L93 Difference]: Finished difference Result 809 states and 2536 transitions. [2021-07-13 19:47:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:35,019 INFO L225 Difference]: With dead ends: 809 [2021-07-13 19:47:35,019 INFO L226 Difference]: Without dead ends: 740 [2021-07-13 19:47:35,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1164.2ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-07-13 19:47:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 605. [2021-07-13 19:47:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.2268211920529803) internal successors, (1949), 604 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1949 transitions. [2021-07-13 19:47:35,026 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1949 transitions. Word has length 21 [2021-07-13 19:47:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:35,026 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1949 transitions. [2021-07-13 19:47:35,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1949 transitions. [2021-07-13 19:47:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:35,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:35,027 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:35,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6226,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,227 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 605 times [2021-07-13 19:47:35,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:35,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420703482] [2021-07-13 19:47:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:35,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420703482] [2021-07-13 19:47:35,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420703482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105697803] [2021-07-13 19:47:35,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:35,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:35,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:35,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:35,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:35,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:35,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:35,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:35,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:35,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:36,013 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 19:47:36,014 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-13 19:47:36,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:36,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:36,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:36,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:36,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:36,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:36,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:36,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:36,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:36,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:36,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:36,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:36,156 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-13 19:47:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:36,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105697803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:36,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:36,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:36,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594618302] [2021-07-13 19:47:36,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:36,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:36,332 INFO L87 Difference]: Start difference. First operand 605 states and 1949 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,842 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-13 19:47:37,023 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:47:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:37,032 INFO L93 Difference]: Finished difference Result 890 states and 2751 transitions. [2021-07-13 19:47:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:37,034 INFO L225 Difference]: With dead ends: 890 [2021-07-13 19:47:37,034 INFO L226 Difference]: Without dead ends: 843 [2021-07-13 19:47:37,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-07-13 19:47:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 614. [2021-07-13 19:47:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.2495921696574226) internal successors, (1992), 613 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1992 transitions. [2021-07-13 19:47:37,043 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1992 transitions. Word has length 21 [2021-07-13 19:47:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:37,043 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1992 transitions. [2021-07-13 19:47:37,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1992 transitions. [2021-07-13 19:47:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:37,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:37,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:37,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6298 [2021-07-13 19:47:37,266 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 606 times [2021-07-13 19:47:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632173405] [2021-07-13 19:47:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:37,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632173405] [2021-07-13 19:47:37,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632173405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416614461] [2021-07-13 19:47:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:37,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:47:37,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:37,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:37,911 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_180, v_prenex_178], 1=[v_prenex_179, nondet_0]} [2021-07-13 19:47:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:37,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:38,056 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-07-13 19:47:38,056 INFO L628 ElimStorePlain]: treesize reduction 279, result has 33.1 percent of original size [2021-07-13 19:47:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:38,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:38,162 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 19:47:38,162 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-07-13 19:47:38,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:38,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:38,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:38,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:38,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:38,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:38,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:38,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:38,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:38,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:38,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:38,305 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-13 19:47:38,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:38,307 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-13 19:47:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416614461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:38,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:38,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:38,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745773198] [2021-07-13 19:47:38,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:38,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:38,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:38,485 INFO L87 Difference]: Start difference. First operand 614 states and 1992 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:39,506 INFO L93 Difference]: Finished difference Result 858 states and 2642 transitions. [2021-07-13 19:47:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:39,508 INFO L225 Difference]: With dead ends: 858 [2021-07-13 19:47:39,508 INFO L226 Difference]: Without dead ends: 789 [2021-07-13 19:47:39,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 926.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-07-13 19:47:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 602. [2021-07-13 19:47:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.234608985024958) internal successors, (1944), 601 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1944 transitions. [2021-07-13 19:47:39,515 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1944 transitions. Word has length 21 [2021-07-13 19:47:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:39,515 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1944 transitions. [2021-07-13 19:47:39,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1944 transitions. [2021-07-13 19:47:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:39,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:39,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:39,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:39,717 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 607 times [2021-07-13 19:47:39,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:39,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596380372] [2021-07-13 19:47:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:39,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:39,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596380372] [2021-07-13 19:47:39,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596380372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:39,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281768386] [2021-07-13 19:47:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:40,172 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-07-13 19:47:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:40,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:40,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:40,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,682 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-13 19:47:40,683 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-13 19:47:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:40,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:40,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:40,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:40,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:40,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:40,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:40,879 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 19:47:40,879 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.7 percent of original size [2021-07-13 19:47:40,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:40,881 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-13 19:47:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:41,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281768386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:41,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:41,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:47:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782665258] [2021-07-13 19:47:41,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:41,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:41,070 INFO L87 Difference]: Start difference. First operand 602 states and 1944 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:41,346 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-13 19:47:42,017 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 19:47:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:42,226 INFO L93 Difference]: Finished difference Result 941 states and 2880 transitions. [2021-07-13 19:47:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:42,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:42,228 INFO L225 Difference]: With dead ends: 941 [2021-07-13 19:47:42,228 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 19:47:42,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1200.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:47:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 19:47:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 620. [2021-07-13 19:47:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.268174474959612) internal successors, (2023), 619 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2023 transitions. [2021-07-13 19:47:42,241 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2023 transitions. Word has length 21 [2021-07-13 19:47:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:42,241 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2023 transitions. [2021-07-13 19:47:42,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2023 transitions. [2021-07-13 19:47:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:42,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:42,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:42,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6392 [2021-07-13 19:47:42,443 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash -917949072, now seen corresponding path program 608 times [2021-07-13 19:47:42,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:42,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805141770] [2021-07-13 19:47:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:42,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:42,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805141770] [2021-07-13 19:47:42,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805141770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:42,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124993923] [2021-07-13 19:47:42,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:42,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:43,161 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, v_prenex_189], 1=[v_prenex_188, nondet_0]} [2021-07-13 19:47:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:43,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:43,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:43,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,320 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 19:47:43,320 INFO L628 ElimStorePlain]: treesize reduction 221, result has 39.8 percent of original size [2021-07-13 19:47:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:43,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,429 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-13 19:47:43,429 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-07-13 19:47:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:43,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:43,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:43,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:43,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,574 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-13 19:47:43,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:43,577 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-13 19:47:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:43,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124993923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:43,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:43,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803245327] [2021-07-13 19:47:43,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:43,763 INFO L87 Difference]: Start difference. First operand 620 states and 2023 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,028 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-13 19:47:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:44,960 INFO L93 Difference]: Finished difference Result 1014 states and 3030 transitions. [2021-07-13 19:47:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:44,961 INFO L225 Difference]: With dead ends: 1014 [2021-07-13 19:47:44,962 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 19:47:44,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1140.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 19:47:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 623. [2021-07-13 19:47:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.2443729903536975) internal successors, (2018), 622 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2018 transitions. [2021-07-13 19:47:44,970 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2018 transitions. Word has length 21 [2021-07-13 19:47:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:44,970 INFO L482 AbstractCegarLoop]: Abstraction has 623 states and 2018 transitions. [2021-07-13 19:47:44,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2018 transitions. [2021-07-13 19:47:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:44,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:44,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:45,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6459,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:45,171 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1051616592, now seen corresponding path program 609 times [2021-07-13 19:47:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:45,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978669146] [2021-07-13 19:47:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:45,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978669146] [2021-07-13 19:47:45,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978669146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588760088] [2021-07-13 19:47:45,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:45,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:47:45,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:45,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:45,733 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_193, v_prenex_194], 1=[nondet_0]} [2021-07-13 19:47:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:47:45,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:45,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:47:45,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:45,788 INFO L628 ElimStorePlain]: treesize reduction 107, result has 28.7 percent of original size [2021-07-13 19:47:45,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-07-13 19:47:45,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:45,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:45,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:45,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:45,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:47:45,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:30 [2021-07-13 19:47:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588760088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:45,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:47:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008953801] [2021-07-13 19:47:45,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:45,873 INFO L87 Difference]: Start difference. First operand 623 states and 2018 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,103 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-13 19:47:46,300 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-13 19:47:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:46,529 INFO L93 Difference]: Finished difference Result 782 states and 2402 transitions. [2021-07-13 19:47:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:46,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:46,531 INFO L225 Difference]: With dead ends: 782 [2021-07-13 19:47:46,531 INFO L226 Difference]: Without dead ends: 728 [2021-07-13 19:47:46,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-13 19:47:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 629. [2021-07-13 19:47:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2245222929936306) internal successors, (2025), 628 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2025 transitions. [2021-07-13 19:47:46,539 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2025 transitions. Word has length 21 [2021-07-13 19:47:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:46,539 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2025 transitions. [2021-07-13 19:47:46,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2025 transitions. [2021-07-13 19:47:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:46,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:46,540 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:46,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6521 [2021-07-13 19:47:46,740 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash 671100815, now seen corresponding path program 22 times [2021-07-13 19:47:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837824076] [2021-07-13 19:47:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:46,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837824076] [2021-07-13 19:47:46,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837824076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984812375] [2021-07-13 19:47:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:46,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:46,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:47,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984812375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:47,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:47,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-13 19:47:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367629756] [2021-07-13 19:47:47,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:47,063 INFO L87 Difference]: Start difference. First operand 629 states and 2025 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:48,518 INFO L93 Difference]: Finished difference Result 1261 states and 3687 transitions. [2021-07-13 19:47:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:47:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:48,519 INFO L225 Difference]: With dead ends: 1261 [2021-07-13 19:47:48,519 INFO L226 Difference]: Without dead ends: 997 [2021-07-13 19:47:48,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1195.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:47:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-07-13 19:47:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 632. [2021-07-13 19:47:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.202852614896989) internal successors, (2021), 631 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2021 transitions. [2021-07-13 19:47:48,533 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2021 transitions. Word has length 21 [2021-07-13 19:47:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:48,533 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2021 transitions. [2021-07-13 19:47:48,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2021 transitions. [2021-07-13 19:47:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:48,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:48,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6556,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:48,734 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 610 times [2021-07-13 19:47:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:48,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786546935] [2021-07-13 19:47:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:48,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786546935] [2021-07-13 19:47:48,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786546935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992580714] [2021-07-13 19:47:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:48,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:48,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:48,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:49,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:49,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:49,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:49,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:49,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:49,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:49,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:49,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:47:49,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-13 19:47:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:49,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992580714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:49,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:49,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:49,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270195035] [2021-07-13 19:47:49,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:49,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:49,218 INFO L87 Difference]: Start difference. First operand 632 states and 2021 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:50,017 INFO L93 Difference]: Finished difference Result 968 states and 2993 transitions. [2021-07-13 19:47:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:50,019 INFO L225 Difference]: With dead ends: 968 [2021-07-13 19:47:50,019 INFO L226 Difference]: Without dead ends: 852 [2021-07-13 19:47:50,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 755.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-13 19:47:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 651. [2021-07-13 19:47:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.2246153846153844) internal successors, (2096), 650 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2096 transitions. [2021-07-13 19:47:50,027 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2096 transitions. Word has length 21 [2021-07-13 19:47:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:50,027 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 2096 transitions. [2021-07-13 19:47:50,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2096 transitions. [2021-07-13 19:47:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:50,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:50,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6560,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:50,228 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 611 times [2021-07-13 19:47:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723995410] [2021-07-13 19:47:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723995410] [2021-07-13 19:47:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723995410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015770859] [2021-07-13 19:47:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:50,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:50,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:50,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:50,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:50,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:50,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:50,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:50,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:50,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:50,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:50,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:50,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:50,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:50,890 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-07-13 19:47:50,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:50,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:50,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:50,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:47:50,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-07-13 19:47:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:51,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015770859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:51,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:51,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:51,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683417731] [2021-07-13 19:47:51,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:51,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:51,058 INFO L87 Difference]: Start difference. First operand 651 states and 2096 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:52,109 INFO L93 Difference]: Finished difference Result 908 states and 2840 transitions. [2021-07-13 19:47:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:52,111 INFO L225 Difference]: With dead ends: 908 [2021-07-13 19:47:52,111 INFO L226 Difference]: Without dead ends: 839 [2021-07-13 19:47:52,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-07-13 19:47:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 658. [2021-07-13 19:47:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.234398782343988) internal successors, (2125), 657 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2125 transitions. [2021-07-13 19:47:52,119 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2125 transitions. Word has length 21 [2021-07-13 19:47:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:52,119 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2125 transitions. [2021-07-13 19:47:52,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2125 transitions. [2021-07-13 19:47:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:52,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:52,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:52,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6576 [2021-07-13 19:47:52,321 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 612 times [2021-07-13 19:47:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:52,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102671502] [2021-07-13 19:47:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:52,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102671502] [2021-07-13 19:47:52,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102671502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585108815] [2021-07-13 19:47:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:52,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:47:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:52,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:47:52,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:52,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:52,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:52,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:47:52,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:52,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:52,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:52,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:52,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:52,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:52,685 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:52,779 INFO L628 ElimStorePlain]: treesize reduction 64, result has 62.6 percent of original size [2021-07-13 19:47:52,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:52,780 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:401, output treesize:107 [2021-07-13 19:47:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585108815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:47:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980126193] [2021-07-13 19:47:52,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:52,946 INFO L87 Difference]: Start difference. First operand 658 states and 2125 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,357 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-13 19:47:53,508 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 19:47:53,664 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-13 19:47:53,834 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 19:47:53,969 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:47:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:54,037 INFO L93 Difference]: Finished difference Result 1121 states and 3412 transitions. [2021-07-13 19:47:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:54,039 INFO L225 Difference]: With dead ends: 1121 [2021-07-13 19:47:54,039 INFO L226 Difference]: Without dead ends: 980 [2021-07-13 19:47:54,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-07-13 19:47:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 672. [2021-07-13 19:47:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.263785394932936) internal successors, (2190), 671 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2190 transitions. [2021-07-13 19:47:54,047 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2190 transitions. Word has length 21 [2021-07-13 19:47:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:54,047 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2190 transitions. [2021-07-13 19:47:54,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2190 transitions. [2021-07-13 19:47:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:54,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:54,048 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:54,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6623,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:54,249 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 613 times [2021-07-13 19:47:54,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:54,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845346349] [2021-07-13 19:47:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:54,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:54,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845346349] [2021-07-13 19:47:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845346349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636169874] [2021-07-13 19:47:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:47:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:54,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:54,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:47:54,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:54,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:54,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:47:54,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:54,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:47:54,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:47:54,674 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-13 19:47:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:54,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636169874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:54,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:54,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 19:47:54,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198882201] [2021-07-13 19:47:54,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:54,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:54,826 INFO L87 Difference]: Start difference. First operand 672 states and 2190 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:55,669 INFO L93 Difference]: Finished difference Result 991 states and 3102 transitions. [2021-07-13 19:47:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:55,671 INFO L225 Difference]: With dead ends: 991 [2021-07-13 19:47:55,671 INFO L226 Difference]: Without dead ends: 875 [2021-07-13 19:47:55,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-13 19:47:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 692. [2021-07-13 19:47:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-13 19:47:55,679 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-13 19:47:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:55,680 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-13 19:47:55,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-13 19:47:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:55,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:55,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:55,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6642 [2021-07-13 19:47:55,881 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 614 times [2021-07-13 19:47:55,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:55,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037639397] [2021-07-13 19:47:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:56,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:56,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037639397] [2021-07-13 19:47:56,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037639397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648179488] [2021-07-13 19:47:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:56,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:56,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:56,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:47:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:56,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:47:56,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:56,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:56,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:47:56,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:56,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:47:56,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:47:56,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:56,546 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:56,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:47:56,557 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:56,562 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:56,737 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-13 19:47:56,738 INFO L628 ElimStorePlain]: treesize reduction 79, result has 70.4 percent of original size [2021-07-13 19:47:56,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:47:56,740 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:108 [2021-07-13 19:47:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:56,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648179488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:56,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:56,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991746361] [2021-07-13 19:47:56,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:56,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:56,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:56,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:56,937 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:57,348 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-13 19:47:57,511 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 19:47:57,670 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 19:47:57,812 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 19:47:57,952 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 19:47:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:58,007 INFO L93 Difference]: Finished difference Result 940 states and 2947 transitions. [2021-07-13 19:47:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:47:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:58,009 INFO L225 Difference]: With dead ends: 940 [2021-07-13 19:47:58,009 INFO L226 Difference]: Without dead ends: 846 [2021-07-13 19:47:58,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1113.9ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-07-13 19:47:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 692. [2021-07-13 19:47:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-13 19:47:58,017 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-13 19:47:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:58,017 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-13 19:47:58,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-13 19:47:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:47:58,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:58,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:58,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:58,218 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 615 times [2021-07-13 19:47:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:58,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208574236] [2021-07-13 19:47:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:58,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:58,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208574236] [2021-07-13 19:47:58,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208574236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:58,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371161115] [2021-07-13 19:47:58,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:58,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:58,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:47:58,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:47:58,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:47:58,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:47:58,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:47:58,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:47:58,975 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:58,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:58,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:47:58,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:59,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:47:59,000 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:59,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:59,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:59,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:47:59,009 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:59,129 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 19:47:59,130 INFO L628 ElimStorePlain]: treesize reduction 43, result has 77.4 percent of original size [2021-07-13 19:47:59,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:47:59,132 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-13 19:47:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:59,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371161115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:59,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:59,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:47:59,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738524587] [2021-07-13 19:47:59,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:59,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:59,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:59,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:59,310 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,994 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 19:48:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:00,260 INFO L93 Difference]: Finished difference Result 1079 states and 3345 transitions. [2021-07-13 19:48:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:00,262 INFO L225 Difference]: With dead ends: 1079 [2021-07-13 19:48:00,262 INFO L226 Difference]: Without dead ends: 985 [2021-07-13 19:48:00,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 942.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-13 19:48:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2021-07-13 19:48:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.3163120567375888) internal successors, (2338), 705 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2338 transitions. [2021-07-13 19:48:00,272 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2338 transitions. Word has length 21 [2021-07-13 19:48:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:00,272 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2338 transitions. [2021-07-13 19:48:00,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2338 transitions. [2021-07-13 19:48:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:00,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:00,273 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:00,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6729 [2021-07-13 19:48:00,474 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 616 times [2021-07-13 19:48:00,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:00,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281664889] [2021-07-13 19:48:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:00,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:00,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281664889] [2021-07-13 19:48:00,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281664889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:00,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441118548] [2021-07-13 19:48:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:00,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:00,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:01,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:01,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:01,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:01,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:01,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:01,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:01,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:01,064 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:01,145 INFO L628 ElimStorePlain]: treesize reduction 44, result has 69.2 percent of original size [2021-07-13 19:48:01,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:01,147 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-07-13 19:48:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441118548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265030924] [2021-07-13 19:48:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:01,315 INFO L87 Difference]: Start difference. First operand 706 states and 2338 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:01,707 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-07-13 19:48:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:02,325 INFO L93 Difference]: Finished difference Result 970 states and 3035 transitions. [2021-07-13 19:48:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:02,327 INFO L225 Difference]: With dead ends: 970 [2021-07-13 19:48:02,327 INFO L226 Difference]: Without dead ends: 901 [2021-07-13 19:48:02,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1021.3ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-13 19:48:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 692. [2021-07-13 19:48:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-13 19:48:02,336 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-13 19:48:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:02,337 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-13 19:48:02,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-13 19:48:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:02,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:02,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:02,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6847 [2021-07-13 19:48:02,538 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 617 times [2021-07-13 19:48:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099354234] [2021-07-13 19:48:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:02,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099354234] [2021-07-13 19:48:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099354234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946252086] [2021-07-13 19:48:02,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:02,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:48:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:03,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:03,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:48:03,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:48:03,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:03,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:48:03,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:03,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:03,190 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-07-13 19:48:03,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:03,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-07-13 19:48:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:03,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946252086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:03,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:03,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:48:03,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009408753] [2021-07-13 19:48:03,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:03,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:03,281 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:03,873 INFO L93 Difference]: Finished difference Result 872 states and 2822 transitions. [2021-07-13 19:48:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:03,874 INFO L225 Difference]: With dead ends: 872 [2021-07-13 19:48:03,874 INFO L226 Difference]: Without dead ends: 825 [2021-07-13 19:48:03,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-13 19:48:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 710. [2021-07-13 19:48:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.286318758815233) internal successors, (2330), 709 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-07-13 19:48:03,883 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-07-13 19:48:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:03,883 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-07-13 19:48:03,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-07-13 19:48:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:03,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:03,884 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6897,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:04,085 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 618 times [2021-07-13 19:48:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:04,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708652682] [2021-07-13 19:48:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:04,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708652682] [2021-07-13 19:48:04,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708652682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360312158] [2021-07-13 19:48:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:04,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:04,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:48:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:04,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:04,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:04,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:04,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:04,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:04,734 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:48:04,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:04,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:04,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:04,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:04,910 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-13 19:48:04,910 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-07-13 19:48:04,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:04,912 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-07-13 19:48:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:05,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360312158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:05,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:05,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:48:05,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878409913] [2021-07-13 19:48:05,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:05,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:05,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:05,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:05,116 INFO L87 Difference]: Start difference. First operand 710 states and 2330 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,517 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-13 19:48:05,681 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 19:48:05,842 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-13 19:48:06,022 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 19:48:06,165 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:48:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:06,243 INFO L93 Difference]: Finished difference Result 1096 states and 3417 transitions. [2021-07-13 19:48:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:06,245 INFO L225 Difference]: With dead ends: 1096 [2021-07-13 19:48:06,245 INFO L226 Difference]: Without dead ends: 955 [2021-07-13 19:48:06,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1118.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-13 19:48:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 710. [2021-07-13 19:48:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.286318758815233) internal successors, (2330), 709 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-07-13 19:48:06,255 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-07-13 19:48:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:06,255 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-07-13 19:48:06,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-07-13 19:48:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:06,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:06,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:06,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6932,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:06,456 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 619 times [2021-07-13 19:48:06,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:06,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161735212] [2021-07-13 19:48:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:06,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:06,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161735212] [2021-07-13 19:48:06,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161735212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:06,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492426303] [2021-07-13 19:48:06,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:07,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:07,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:07,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:07,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,179 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 19:48:07,180 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-13 19:48:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:07,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:07,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:07,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:07,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:48:07,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:07,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:07,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:07,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:07,331 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-13 19:48:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:07,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492426303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:07,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:07,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:07,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801559638] [2021-07-13 19:48:07,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:07,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:07,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:07,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:07,602 INFO L87 Difference]: Start difference. First operand 710 states and 2330 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:08,436 INFO L93 Difference]: Finished difference Result 1025 states and 3210 transitions. [2021-07-13 19:48:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:08,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:08,438 INFO L225 Difference]: With dead ends: 1025 [2021-07-13 19:48:08,438 INFO L226 Difference]: Without dead ends: 956 [2021-07-13 19:48:08,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 897.9ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-13 19:48:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 719. [2021-07-13 19:48:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.3050139275766015) internal successors, (2373), 718 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2373 transitions. [2021-07-13 19:48:08,447 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2373 transitions. Word has length 21 [2021-07-13 19:48:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:08,447 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2373 transitions. [2021-07-13 19:48:08,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2373 transitions. [2021-07-13 19:48:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:08,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:08,448 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:08,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7006,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:08,649 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 620 times [2021-07-13 19:48:08,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:08,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088098398] [2021-07-13 19:48:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:08,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088098398] [2021-07-13 19:48:08,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088098398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730589969] [2021-07-13 19:48:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:08,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:08,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:09,211 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_212, v_prenex_213], 1=[nondet_0, v_prenex_214]} [2021-07-13 19:48:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:09,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:09,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:09,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,355 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 19:48:09,356 INFO L628 ElimStorePlain]: treesize reduction 237, result has 38.8 percent of original size [2021-07-13 19:48:09,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:09,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,454 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.6 percent of original size [2021-07-13 19:48:09,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:09,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:09,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:48:09,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:09,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,537 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-13 19:48:09,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:09,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:09,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:09,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:09,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:09,579 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-13 19:48:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:09,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730589969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:09,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:09,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:09,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382767854] [2021-07-13 19:48:09,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:09,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:09,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:09,758 INFO L87 Difference]: Start difference. First operand 719 states and 2373 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:10,651 INFO L93 Difference]: Finished difference Result 1026 states and 3191 transitions. [2021-07-13 19:48:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:10,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:10,653 INFO L225 Difference]: With dead ends: 1026 [2021-07-13 19:48:10,653 INFO L226 Difference]: Without dead ends: 878 [2021-07-13 19:48:10,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 837.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-13 19:48:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2021-07-13 19:48:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.2868852459016393) internal successors, (2406), 732 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-07-13 19:48:10,662 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-07-13 19:48:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:10,662 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-07-13 19:48:10,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-07-13 19:48:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:10,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:10,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:10,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7068 [2021-07-13 19:48:10,863 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 621 times [2021-07-13 19:48:10,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:10,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388498270] [2021-07-13 19:48:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:10,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388498270] [2021-07-13 19:48:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388498270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18716341] [2021-07-13 19:48:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:11,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:11,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:11,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:11,299 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 19:48:11,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:11,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:11,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:11,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:11,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:11,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:11,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:11,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:48:11,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:11,643 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:11,774 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-13 19:48:11,774 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-07-13 19:48:11,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:11,776 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-07-13 19:48:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18716341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:12,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:12,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:12,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497877921] [2021-07-13 19:48:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:12,043 INFO L87 Difference]: Start difference. First operand 733 states and 2406 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:12,310 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 19:48:12,587 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-13 19:48:12,878 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-13 19:48:13,024 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-07-13 19:48:13,160 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-13 19:48:13,314 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-13 19:48:13,474 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-07-13 19:48:13,634 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 19:48:13,777 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-13 19:48:14,027 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-13 19:48:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:14,095 INFO L93 Difference]: Finished difference Result 1124 states and 3466 transitions. [2021-07-13 19:48:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:14,097 INFO L225 Difference]: With dead ends: 1124 [2021-07-13 19:48:14,097 INFO L226 Difference]: Without dead ends: 986 [2021-07-13 19:48:14,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2173.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:48:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-13 19:48:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 751. [2021-07-13 19:48:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3133333333333335) internal successors, (2485), 750 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2485 transitions. [2021-07-13 19:48:14,106 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2485 transitions. Word has length 21 [2021-07-13 19:48:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:14,106 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2485 transitions. [2021-07-13 19:48:14,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2485 transitions. [2021-07-13 19:48:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:14,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:14,107 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7119,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,308 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 622 times [2021-07-13 19:48:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870670968] [2021-07-13 19:48:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:14,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:14,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870670968] [2021-07-13 19:48:14,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870670968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:14,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056792086] [2021-07-13 19:48:14,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:14,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:14,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:14,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:14,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:14,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:14,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:14,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:14,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:14,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:14,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:15,058 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-07-13 19:48:15,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:15,060 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-07-13 19:48:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:15,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056792086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:15,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:15,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:15,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42197438] [2021-07-13 19:48:15,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:15,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:15,239 INFO L87 Difference]: Start difference. First operand 751 states and 2485 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,518 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 19:48:15,839 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-07-13 19:48:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:16,506 INFO L93 Difference]: Finished difference Result 1032 states and 3203 transitions. [2021-07-13 19:48:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:16,508 INFO L225 Difference]: With dead ends: 1032 [2021-07-13 19:48:16,508 INFO L226 Difference]: Without dead ends: 963 [2021-07-13 19:48:16,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1258.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-13 19:48:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 742. [2021-07-13 19:48:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.2955465587044532) internal successors, (2442), 741 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2442 transitions. [2021-07-13 19:48:16,517 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2442 transitions. Word has length 21 [2021-07-13 19:48:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:16,517 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2442 transitions. [2021-07-13 19:48:16,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2442 transitions. [2021-07-13 19:48:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:16,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:16,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:16,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7195,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:16,719 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 623 times [2021-07-13 19:48:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:16,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013305700] [2021-07-13 19:48:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:16,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:16,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013305700] [2021-07-13 19:48:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013305700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:16,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919261502] [2021-07-13 19:48:16,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:16,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:16,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:16,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:17,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:17,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:17,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:17,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:17,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:17,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:17,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:17,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:17,451 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:17,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:17,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:17,566 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:48:17,566 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-07-13 19:48:17,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:17,568 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-07-13 19:48:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:17,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919261502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:17,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:17,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:17,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747599358] [2021-07-13 19:48:17,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:17,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:17,737 INFO L87 Difference]: Start difference. First operand 742 states and 2442 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:18,011 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 19:48:18,215 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 19:48:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:19,011 INFO L93 Difference]: Finished difference Result 995 states and 3138 transitions. [2021-07-13 19:48:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:19,013 INFO L225 Difference]: With dead ends: 995 [2021-07-13 19:48:19,013 INFO L226 Difference]: Without dead ends: 926 [2021-07-13 19:48:19,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1204.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-07-13 19:48:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 733. [2021-07-13 19:48:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.2868852459016393) internal successors, (2406), 732 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-07-13 19:48:19,022 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-07-13 19:48:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:19,022 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-07-13 19:48:19,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-07-13 19:48:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:19,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:19,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:19,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7249,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:19,224 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 624 times [2021-07-13 19:48:19,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:19,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556277982] [2021-07-13 19:48:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:19,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556277982] [2021-07-13 19:48:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556277982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802817538] [2021-07-13 19:48:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:19,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:19,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:19,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:19,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:19,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:19,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:19,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:48:19,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:19,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:19,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:20,015 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.6 percent of original size [2021-07-13 19:48:20,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:20,017 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-07-13 19:48:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:20,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802817538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:20,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:20,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:20,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709543192] [2021-07-13 19:48:20,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:20,138 INFO L87 Difference]: Start difference. First operand 733 states and 2406 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:21,038 INFO L93 Difference]: Finished difference Result 952 states and 3054 transitions. [2021-07-13 19:48:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:21,040 INFO L225 Difference]: With dead ends: 952 [2021-07-13 19:48:21,040 INFO L226 Difference]: Without dead ends: 883 [2021-07-13 19:48:21,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-07-13 19:48:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 739. [2021-07-13 19:48:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2886178861788617) internal successors, (2427), 738 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-07-13 19:48:21,050 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-07-13 19:48:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:21,050 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-07-13 19:48:21,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-07-13 19:48:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:21,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:21,051 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:21,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7286,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:21,251 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 625 times [2021-07-13 19:48:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:21,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890752990] [2021-07-13 19:48:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:21,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:21,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890752990] [2021-07-13 19:48:21,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890752990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:21,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731841544] [2021-07-13 19:48:21,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:21,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:21,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:21,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:21,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:21,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:21,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:21,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:21,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:21,868 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:21,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:21,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:21,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:21,934 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-13 19:48:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:22,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731841544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:22,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:22,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328513338] [2021-07-13 19:48:22,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:22,149 INFO L87 Difference]: Start difference. First operand 739 states and 2427 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,086 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-13 19:48:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:23,273 INFO L93 Difference]: Finished difference Result 965 states and 3081 transitions. [2021-07-13 19:48:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:23,274 INFO L225 Difference]: With dead ends: 965 [2021-07-13 19:48:23,274 INFO L226 Difference]: Without dead ends: 896 [2021-07-13 19:48:23,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1168.6ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-13 19:48:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-07-13 19:48:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2886178861788617) internal successors, (2427), 738 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-07-13 19:48:23,283 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-07-13 19:48:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:23,283 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-07-13 19:48:23,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-07-13 19:48:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:23,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:23,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:23,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7370 [2021-07-13 19:48:23,485 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 626 times [2021-07-13 19:48:23,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:23,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845990516] [2021-07-13 19:48:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:23,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845990516] [2021-07-13 19:48:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845990516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506458300] [2021-07-13 19:48:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:23,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:23,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:48:24,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:48:24,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:48:24,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:24,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:24,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:24,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:24,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:24,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:48:24,229 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:24,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:24,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:24,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,370 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-13 19:48:24,370 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.2 percent of original size [2021-07-13 19:48:24,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:24,372 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-13 19:48:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:24,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506458300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293461231] [2021-07-13 19:48:24,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:24,616 INFO L87 Difference]: Start difference. First operand 739 states and 2427 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:26,134 INFO L93 Difference]: Finished difference Result 1143 states and 3515 transitions. [2021-07-13 19:48:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:48:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:26,136 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:48:26,136 INFO L226 Difference]: Without dead ends: 1005 [2021-07-13 19:48:26,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-13 19:48:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 748. [2021-07-13 19:48:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3065595716198124) internal successors, (2470), 747 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2470 transitions. [2021-07-13 19:48:26,145 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2470 transitions. Word has length 21 [2021-07-13 19:48:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:26,145 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2470 transitions. [2021-07-13 19:48:26,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2470 transitions. [2021-07-13 19:48:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:26,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:26,146 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:26,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7410 [2021-07-13 19:48:26,347 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 627 times [2021-07-13 19:48:26,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:26,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734957704] [2021-07-13 19:48:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734957704] [2021-07-13 19:48:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734957704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216857116] [2021-07-13 19:48:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:48:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:26,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:26,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:26,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:26,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:26,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:26,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:26,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:26,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:27,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:27,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:27,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:27,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:27,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:27,029 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:27,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:27,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:27,037 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:27,146 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:48:27,147 INFO L628 ElimStorePlain]: treesize reduction 59, result has 69.1 percent of original size [2021-07-13 19:48:27,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:27,149 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-13 19:48:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:27,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216857116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:27,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:27,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265529350] [2021-07-13 19:48:27,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:27,322 INFO L87 Difference]: Start difference. First operand 748 states and 2470 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:28,231 INFO L93 Difference]: Finished difference Result 1014 states and 3187 transitions. [2021-07-13 19:48:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:28,232 INFO L225 Difference]: With dead ends: 1014 [2021-07-13 19:48:28,232 INFO L226 Difference]: Without dead ends: 945 [2021-07-13 19:48:28,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-13 19:48:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 730. [2021-07-13 19:48:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2825788751714677) internal successors, (2393), 729 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2393 transitions. [2021-07-13 19:48:28,242 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2393 transitions. Word has length 21 [2021-07-13 19:48:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2393 transitions. [2021-07-13 19:48:28,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2393 transitions. [2021-07-13 19:48:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:28,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:28,243 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:28,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7528 [2021-07-13 19:48:28,443 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 628 times [2021-07-13 19:48:28,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:28,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768068653] [2021-07-13 19:48:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:28,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:28,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768068653] [2021-07-13 19:48:28,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768068653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:28,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194218383] [2021-07-13 19:48:28,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:28,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:28,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:28,889 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 19:48:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:29,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:29,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:48:29,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-07-13 19:48:29,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 19:48:29,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:48:29,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:29,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:29,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-07-13 19:48:29,358 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:29,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:29,374 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:29,378 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:29,505 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-13 19:48:29,505 INFO L628 ElimStorePlain]: treesize reduction 79, result has 65.0 percent of original size [2021-07-13 19:48:29,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:29,507 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-13 19:48:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:29,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194218383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:29,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:29,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596456689] [2021-07-13 19:48:29,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:29,765 INFO L87 Difference]: Start difference. First operand 730 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,038 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 19:48:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:31,546 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-07-13 19:48:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:31,548 INFO L225 Difference]: With dead ends: 1141 [2021-07-13 19:48:31,548 INFO L226 Difference]: Without dead ends: 1003 [2021-07-13 19:48:31,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1862.7ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:48:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-07-13 19:48:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 748. [2021-07-13 19:48:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3092369477911645) internal successors, (2472), 747 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2472 transitions. [2021-07-13 19:48:31,558 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2472 transitions. Word has length 21 [2021-07-13 19:48:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:31,558 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2472 transitions. [2021-07-13 19:48:31,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2472 transitions. [2021-07-13 19:48:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:31,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:31,559 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:31,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7585,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:31,759 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 629 times [2021-07-13 19:48:31,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:31,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276621934] [2021-07-13 19:48:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:31,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276621934] [2021-07-13 19:48:31,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276621934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769280327] [2021-07-13 19:48:31,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:32,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:32,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:32,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:32,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:32,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:48:32,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:32,472 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:48:32,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:32,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:32,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:32,491 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:32,494 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:32,499 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:32,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:48:32,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:32,616 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:48:32,616 INFO L628 ElimStorePlain]: treesize reduction 57, result has 69.8 percent of original size [2021-07-13 19:48:32,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:32,618 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-13 19:48:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:32,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769280327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:32,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:32,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:32,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792294194] [2021-07-13 19:48:32,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:32,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:32,788 INFO L87 Difference]: Start difference. First operand 748 states and 2472 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,042 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 19:48:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:34,004 INFO L93 Difference]: Finished difference Result 1164 states and 3546 transitions. [2021-07-13 19:48:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:34,006 INFO L225 Difference]: With dead ends: 1164 [2021-07-13 19:48:34,006 INFO L226 Difference]: Without dead ends: 1080 [2021-07-13 19:48:34,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-07-13 19:48:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 751. [2021-07-13 19:48:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.2893333333333334) internal successors, (2467), 750 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2467 transitions. [2021-07-13 19:48:34,020 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2467 transitions. Word has length 21 [2021-07-13 19:48:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:34,020 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2467 transitions. [2021-07-13 19:48:34,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2467 transitions. [2021-07-13 19:48:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:34,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:34,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:34,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7701,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,222 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 630 times [2021-07-13 19:48:34,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:34,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042680321] [2021-07-13 19:48:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042680321] [2021-07-13 19:48:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042680321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705342852] [2021-07-13 19:48:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:34,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:34,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:34,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:34,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:34,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:34,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:34,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:34,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:34,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:34,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:34,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:34,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:34,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-13 19:48:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705342852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:34,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:48:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623198840] [2021-07-13 19:48:34,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:48:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:48:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:34,905 INFO L87 Difference]: Start difference. First operand 751 states and 2467 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,007 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-07-13 19:48:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:36,066 INFO L93 Difference]: Finished difference Result 1118 states and 3569 transitions. [2021-07-13 19:48:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:48:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:36,068 INFO L225 Difference]: With dead ends: 1118 [2021-07-13 19:48:36,068 INFO L226 Difference]: Without dead ends: 1042 [2021-07-13 19:48:36,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:48:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-13 19:48:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 721. [2021-07-13 19:48:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.286111111111111) internal successors, (2366), 720 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2366 transitions. [2021-07-13 19:48:36,078 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2366 transitions. Word has length 21 [2021-07-13 19:48:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:36,079 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2366 transitions. [2021-07-13 19:48:36,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2366 transitions. [2021-07-13 19:48:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:36,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:36,080 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:36,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,280 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 631 times [2021-07-13 19:48:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:36,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114136151] [2021-07-13 19:48:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114136151] [2021-07-13 19:48:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114136151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432480019] [2021-07-13 19:48:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:36,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:48:36,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:48:36,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:36,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:36,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:37,109 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 19:48:37,109 INFO L628 ElimStorePlain]: treesize reduction 164, result has 45.7 percent of original size [2021-07-13 19:48:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:37,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:37,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:37,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:37,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:37,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:37,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:37,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:37,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:37,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:37,227 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-13 19:48:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432480019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:37,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:37,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:48:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659842812] [2021-07-13 19:48:37,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:37,485 INFO L87 Difference]: Start difference. First operand 721 states and 2366 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,809 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 19:48:38,032 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 19:48:38,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-13 19:48:38,430 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 19:48:38,658 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-13 19:48:38,840 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-13 19:48:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:38,949 INFO L93 Difference]: Finished difference Result 1233 states and 3826 transitions. [2021-07-13 19:48:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:38,951 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:48:38,951 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 19:48:38,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1479.5ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 19:48:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 748. [2021-07-13 19:48:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.321285140562249) internal successors, (2481), 747 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2481 transitions. [2021-07-13 19:48:38,962 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2481 transitions. Word has length 21 [2021-07-13 19:48:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:38,962 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2481 transitions. [2021-07-13 19:48:38,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2481 transitions. [2021-07-13 19:48:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:38,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:38,963 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:39,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7774 [2021-07-13 19:48:39,163 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 632 times [2021-07-13 19:48:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:39,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213070981] [2021-07-13 19:48:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:39,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:39,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213070981] [2021-07-13 19:48:39,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213070981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:39,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108863475] [2021-07-13 19:48:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:39,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:39,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:39,846 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_241, v_prenex_243], 1=[v_prenex_242, nondet_0]} [2021-07-13 19:48:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:39,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:39,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:39,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:39,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:39,989 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-13 19:48:39,989 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-07-13 19:48:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:39,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:40,088 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-07-13 19:48:40,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:40,093 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:40,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:40,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:48:40,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:40,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:40,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:40,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:40,223 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-13 19:48:40,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:48:40,225 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-13 19:48:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108863475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:40,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:40,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:48:40,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420051809] [2021-07-13 19:48:40,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:40,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:40,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:40,402 INFO L87 Difference]: Start difference. First operand 748 states and 2481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,687 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 19:48:41,925 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 19:48:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:42,086 INFO L93 Difference]: Finished difference Result 1339 states and 4052 transitions. [2021-07-13 19:48:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:42,088 INFO L225 Difference]: With dead ends: 1339 [2021-07-13 19:48:42,088 INFO L226 Difference]: Without dead ends: 1255 [2021-07-13 19:48:42,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1587.3ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:48:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-13 19:48:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 755. [2021-07-13 19:48:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.297082228116711) internal successors, (2486), 754 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2486 transitions. [2021-07-13 19:48:42,105 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2486 transitions. Word has length 21 [2021-07-13 19:48:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:42,105 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2486 transitions. [2021-07-13 19:48:42,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2486 transitions. [2021-07-13 19:48:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:42,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:42,106 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:42,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7835 [2021-07-13 19:48:42,307 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 633 times [2021-07-13 19:48:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:42,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971198348] [2021-07-13 19:48:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:42,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971198348] [2021-07-13 19:48:42,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971198348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148722625] [2021-07-13 19:48:42,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:42,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:48:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:42,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:42,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:42,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:42,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:42,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:42,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:42,792 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-13 19:48:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148722625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:43,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:43,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:48:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034141374] [2021-07-13 19:48:43,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:48:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:48:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:43,002 INFO L87 Difference]: Start difference. First operand 755 states and 2486 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,384 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 19:48:44,774 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 19:48:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:44,876 INFO L93 Difference]: Finished difference Result 1546 states and 4721 transitions. [2021-07-13 19:48:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:48:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:44,878 INFO L225 Difference]: With dead ends: 1546 [2021-07-13 19:48:44,878 INFO L226 Difference]: Without dead ends: 1455 [2021-07-13 19:48:44,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1668.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:48:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-13 19:48:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 748. [2021-07-13 19:48:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.2918340026773762) internal successors, (2459), 747 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2459 transitions. [2021-07-13 19:48:44,891 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2459 transitions. Word has length 21 [2021-07-13 19:48:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:44,891 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2459 transitions. [2021-07-13 19:48:44,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2459 transitions. [2021-07-13 19:48:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:48:44,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:44,892 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:45,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7899,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:45,092 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 634 times [2021-07-13 19:48:45,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:45,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511768090] [2021-07-13 19:48:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511768090] [2021-07-13 19:48:45,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511768090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49634672] [2021-07-13 19:48:45,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:45,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:45,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:48:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:45,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:45,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:45,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:45,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:48:45,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:45,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:45,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:45,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:48:45,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:45,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:45,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:45,517 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-13 19:48:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49634672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:48:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168629306] [2021-07-13 19:48:45,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:48:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:48:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:45,714 INFO L87 Difference]: Start difference. First operand 748 states and 2459 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,928 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-13 19:48:47,236 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-07-13 19:48:47,941 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 19:48:48,350 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-13 19:48:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:48,465 INFO L93 Difference]: Finished difference Result 1789 states and 5418 transitions. [2021-07-13 19:48:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:48:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:48:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:48,468 INFO L225 Difference]: With dead ends: 1789 [2021-07-13 19:48:48,468 INFO L226 Difference]: Without dead ends: 1705 [2021-07-13 19:48:48,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2386.0ms TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:48:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-13 19:48:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 776. [2021-07-13 19:48:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.287741935483871) internal successors, (2548), 775 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2548 transitions. [2021-07-13 19:48:48,482 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2548 transitions. Word has length 21 [2021-07-13 19:48:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:48,482 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2548 transitions. [2021-07-13 19:48:48,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2548 transitions. [2021-07-13 19:48:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:48,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:48,483 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:48,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7918 [2021-07-13 19:48:48,684 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1507938877, now seen corresponding path program 635 times [2021-07-13 19:48:48,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:48,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932900009] [2021-07-13 19:48:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:48,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932900009] [2021-07-13 19:48:48,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932900009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142964360] [2021-07-13 19:48:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:48,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:48,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:48,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:48,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:48:48,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:48,963 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:48:48,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:48:48,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:48:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:49,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142964360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:49,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:49,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:48:49,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206183654] [2021-07-13 19:48:49,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:49,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:49,007 INFO L87 Difference]: Start difference. First operand 776 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:49,368 INFO L93 Difference]: Finished difference Result 1186 states and 3742 transitions. [2021-07-13 19:48:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:49,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:49,371 INFO L225 Difference]: With dead ends: 1186 [2021-07-13 19:48:49,371 INFO L226 Difference]: Without dead ends: 1116 [2021-07-13 19:48:49,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-13 19:48:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2021-07-13 19:48:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.3031088082901556) internal successors, (2550), 772 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2550 transitions. [2021-07-13 19:48:49,382 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2550 transitions. Word has length 22 [2021-07-13 19:48:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:49,382 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2550 transitions. [2021-07-13 19:48:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2550 transitions. [2021-07-13 19:48:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:49,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:49,383 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:49,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7930,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:49,583 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash -955884418, now seen corresponding path program 636 times [2021-07-13 19:48:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:49,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289701927] [2021-07-13 19:48:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:49,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:49,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289701927] [2021-07-13 19:48:49,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289701927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:49,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747783356] [2021-07-13 19:48:49,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:49,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:50,049 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_247], 1=[v_prenex_251, v_prenex_249]} [2021-07-13 19:48:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:50,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:50,110 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-07-13 19:48:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:48:50,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:50,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:50,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:48:50,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:50,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:50,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-07-13 19:48:50,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:48:50,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-13 19:48:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:50,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747783356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:50,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:50,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:50,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110614108] [2021-07-13 19:48:50,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:50,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:50,211 INFO L87 Difference]: Start difference. First operand 773 states and 2550 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:50,994 INFO L93 Difference]: Finished difference Result 1181 states and 3688 transitions. [2021-07-13 19:48:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:50,997 INFO L225 Difference]: With dead ends: 1181 [2021-07-13 19:48:50,997 INFO L226 Difference]: Without dead ends: 1181 [2021-07-13 19:48:50,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-13 19:48:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 795. [2021-07-13 19:48:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.2808564231738035) internal successors, (2605), 794 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2605 transitions. [2021-07-13 19:48:51,008 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2605 transitions. Word has length 22 [2021-07-13 19:48:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:51,008 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2605 transitions. [2021-07-13 19:48:51,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2605 transitions. [2021-07-13 19:48:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:51,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:51,009 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:51,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7934,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,210 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash 202759112, now seen corresponding path program 637 times [2021-07-13 19:48:51,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:51,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708918717] [2021-07-13 19:48:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708918717] [2021-07-13 19:48:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708918717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884667819] [2021-07-13 19:48:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:51,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:51,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:51,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:51,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:51,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:51,701 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:48:51,701 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:48:51,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:48:51,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:48:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884667819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:51,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973937711] [2021-07-13 19:48:51,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:51,760 INFO L87 Difference]: Start difference. First operand 795 states and 2605 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:52,391 INFO L93 Difference]: Finished difference Result 1233 states and 3809 transitions. [2021-07-13 19:48:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:52,393 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:48:52,393 INFO L226 Difference]: Without dead ends: 1233 [2021-07-13 19:48:52,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-13 19:48:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 798. [2021-07-13 19:48:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.282308657465496) internal successors, (2616), 797 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2616 transitions. [2021-07-13 19:48:52,405 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2616 transitions. Word has length 22 [2021-07-13 19:48:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:52,405 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2616 transitions. [2021-07-13 19:48:52,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2616 transitions. [2021-07-13 19:48:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:52,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:52,407 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:52,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7949 [2021-07-13 19:48:52,607 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1291148610, now seen corresponding path program 638 times [2021-07-13 19:48:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:52,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090254869] [2021-07-13 19:48:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:52,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:52,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090254869] [2021-07-13 19:48:52,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090254869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:52,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859981364] [2021-07-13 19:48:52,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:52,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:48:53,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:53,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:53,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:53,106 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:48:53,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-07-13 19:48:53,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:48:53,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:48:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859981364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:53,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:53,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594421659] [2021-07-13 19:48:53,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:53,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:53,161 INFO L87 Difference]: Start difference. First operand 798 states and 2616 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:53,842 INFO L93 Difference]: Finished difference Result 1190 states and 3706 transitions. [2021-07-13 19:48:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:53,844 INFO L225 Difference]: With dead ends: 1190 [2021-07-13 19:48:53,844 INFO L226 Difference]: Without dead ends: 1184 [2021-07-13 19:48:53,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-07-13 19:48:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 790. [2021-07-13 19:48:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.285171102661597) internal successors, (2592), 789 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2592 transitions. [2021-07-13 19:48:53,855 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2592 transitions. Word has length 22 [2021-07-13 19:48:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:53,855 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2592 transitions. [2021-07-13 19:48:53,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2592 transitions. [2021-07-13 19:48:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:53,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:53,857 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7965,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:54,057 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1296850700, now seen corresponding path program 639 times [2021-07-13 19:48:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305465740] [2021-07-13 19:48:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305465740] [2021-07-13 19:48:54,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305465740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665432180] [2021-07-13 19:48:54,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:54,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:54,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665432180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:54,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:54,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895043235] [2021-07-13 19:48:54,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:54,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:54,728 INFO L87 Difference]: Start difference. First operand 790 states and 2592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:55,463 INFO L93 Difference]: Finished difference Result 1167 states and 3629 transitions. [2021-07-13 19:48:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:55,465 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:48:55,465 INFO L226 Difference]: Without dead ends: 1167 [2021-07-13 19:48:55,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 822.8ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-13 19:48:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 796. [2021-07-13 19:48:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.288050314465409) internal successors, (2614), 795 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2614 transitions. [2021-07-13 19:48:55,477 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2614 transitions. Word has length 22 [2021-07-13 19:48:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:55,477 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2614 transitions. [2021-07-13 19:48:55,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2614 transitions. [2021-07-13 19:48:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:55,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:55,478 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:55,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-07-13 19:48:55,678 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -197057022, now seen corresponding path program 640 times [2021-07-13 19:48:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:55,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697645272] [2021-07-13 19:48:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:55,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697645272] [2021-07-13 19:48:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697645272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:55,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787726527] [2021-07-13 19:48:55,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:55,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787726527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:56,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291448309] [2021-07-13 19:48:56,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:56,284 INFO L87 Difference]: Start difference. First operand 796 states and 2614 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:56,897 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-07-13 19:48:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:57,096 INFO L93 Difference]: Finished difference Result 1173 states and 3636 transitions. [2021-07-13 19:48:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:57,098 INFO L225 Difference]: With dead ends: 1173 [2021-07-13 19:48:57,098 INFO L226 Difference]: Without dead ends: 1167 [2021-07-13 19:48:57,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-13 19:48:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 793. [2021-07-13 19:48:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.2866161616161618) internal successors, (2603), 792 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2603 transitions. [2021-07-13 19:48:57,109 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2603 transitions. Word has length 22 [2021-07-13 19:48:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:57,109 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2603 transitions. [2021-07-13 19:48:57,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2603 transitions. [2021-07-13 19:48:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:57,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:57,110 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:57,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7998,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:57,311 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash 340798556, now seen corresponding path program 641 times [2021-07-13 19:48:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:57,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789053657] [2021-07-13 19:48:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789053657] [2021-07-13 19:48:57,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789053657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795967435] [2021-07-13 19:48:57,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:57,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795967435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:57,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:57,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009895609] [2021-07-13 19:48:57,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:57,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:57,899 INFO L87 Difference]: Start difference. First operand 793 states and 2603 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:58,714 INFO L93 Difference]: Finished difference Result 1131 states and 3541 transitions. [2021-07-13 19:48:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:48:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:58,716 INFO L225 Difference]: With dead ends: 1131 [2021-07-13 19:48:58,716 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:48:58,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:48:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-07-13 19:48:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.282828282828283) internal successors, (2600), 792 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2600 transitions. [2021-07-13 19:48:58,732 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2600 transitions. Word has length 22 [2021-07-13 19:48:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:58,732 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2600 transitions. [2021-07-13 19:48:58,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2600 transitions. [2021-07-13 19:48:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:48:58,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:58,733 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:58,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8019 [2021-07-13 19:48:58,933 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash 853951560, now seen corresponding path program 642 times [2021-07-13 19:48:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:58,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361247732] [2021-07-13 19:48:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:59,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361247732] [2021-07-13 19:48:59,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361247732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162609594] [2021-07-13 19:48:59,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:59,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:59,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:59,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:48:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162609594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:59,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:48:59,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638604837] [2021-07-13 19:48:59,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:59,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:59,537 INFO L87 Difference]: Start difference. First operand 793 states and 2600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,067 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 19:49:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:00,397 INFO L93 Difference]: Finished difference Result 1164 states and 3618 transitions. [2021-07-13 19:49:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:00,399 INFO L225 Difference]: With dead ends: 1164 [2021-07-13 19:49:00,399 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 19:49:00,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 19:49:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 802. [2021-07-13 19:49:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.2871410736579274) internal successors, (2633), 801 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2633 transitions. [2021-07-13 19:49:00,410 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2633 transitions. Word has length 22 [2021-07-13 19:49:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:00,410 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2633 transitions. [2021-07-13 19:49:00,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2633 transitions. [2021-07-13 19:49:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:00,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:00,411 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:00,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8039 [2021-07-13 19:49:00,612 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash -639956162, now seen corresponding path program 643 times [2021-07-13 19:49:00,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:00,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646520253] [2021-07-13 19:49:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:00,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:00,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646520253] [2021-07-13 19:49:00,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646520253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:00,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882414931] [2021-07-13 19:49:00,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882414931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:01,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:01,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71563696] [2021-07-13 19:49:01,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:01,229 INFO L87 Difference]: Start difference. First operand 802 states and 2633 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,921 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-13 19:49:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:02,166 INFO L93 Difference]: Finished difference Result 1170 states and 3625 transitions. [2021-07-13 19:49:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:02,168 INFO L225 Difference]: With dead ends: 1170 [2021-07-13 19:49:02,168 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 19:49:02,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 19:49:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 799. [2021-07-13 19:49:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.2857142857142856) internal successors, (2622), 798 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2622 transitions. [2021-07-13 19:49:02,180 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2622 transitions. Word has length 22 [2021-07-13 19:49:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:02,180 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2622 transitions. [2021-07-13 19:49:02,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2622 transitions. [2021-07-13 19:49:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:02,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:02,181 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:02,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8056,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:02,381 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -102100584, now seen corresponding path program 644 times [2021-07-13 19:49:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:02,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224762556] [2021-07-13 19:49:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224762556] [2021-07-13 19:49:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224762556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775629390] [2021-07-13 19:49:02,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:02,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775629390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:02,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:02,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63731678] [2021-07-13 19:49:02,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:02,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:02,968 INFO L87 Difference]: Start difference. First operand 799 states and 2622 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,535 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 19:49:03,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 19:49:03,863 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-07-13 19:49:03,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:03,962 INFO L93 Difference]: Finished difference Result 1134 states and 3543 transitions. [2021-07-13 19:49:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:03,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:03,964 INFO L225 Difference]: With dead ends: 1134 [2021-07-13 19:49:03,964 INFO L226 Difference]: Without dead ends: 1122 [2021-07-13 19:49:03,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:03,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-07-13 19:49:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 796. [2021-07-13 19:49:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.2842767295597484) internal successors, (2611), 795 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2611 transitions. [2021-07-13 19:49:03,975 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2611 transitions. Word has length 22 [2021-07-13 19:49:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:03,976 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2611 transitions. [2021-07-13 19:49:03,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2611 transitions. [2021-07-13 19:49:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:03,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:03,977 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:04,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8075 [2021-07-13 19:49:04,177 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -608446850, now seen corresponding path program 645 times [2021-07-13 19:49:04,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:04,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745337637] [2021-07-13 19:49:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:04,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:04,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745337637] [2021-07-13 19:49:04,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745337637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:04,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287370355] [2021-07-13 19:49:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:04,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:04,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287370355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:04,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:04,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:04,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520962159] [2021-07-13 19:49:04,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:04,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:04,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:04,744 INFO L87 Difference]: Start difference. First operand 796 states and 2611 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,291 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 19:49:05,495 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-13 19:49:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:05,702 INFO L93 Difference]: Finished difference Result 1125 states and 3519 transitions. [2021-07-13 19:49:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:05,704 INFO L225 Difference]: With dead ends: 1125 [2021-07-13 19:49:05,704 INFO L226 Difference]: Without dead ends: 1107 [2021-07-13 19:49:05,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 936.7ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-07-13 19:49:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 796. [2021-07-13 19:49:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.280503144654088) internal successors, (2608), 795 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2608 transitions. [2021-07-13 19:49:05,715 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2608 transitions. Word has length 22 [2021-07-13 19:49:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:05,715 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2608 transitions. [2021-07-13 19:49:05,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2608 transitions. [2021-07-13 19:49:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:05,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:05,716 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:05,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8090,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:05,917 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -835991344, now seen corresponding path program 646 times [2021-07-13 19:49:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:05,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86309437] [2021-07-13 19:49:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:06,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86309437] [2021-07-13 19:49:06,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86309437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:06,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365263464] [2021-07-13 19:49:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:06,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365263464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:06,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:06,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247669442] [2021-07-13 19:49:06,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:06,548 INFO L87 Difference]: Start difference. First operand 796 states and 2608 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,002 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-13 19:49:07,194 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-13 19:49:07,389 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 19:49:07,564 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-13 19:49:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:07,746 INFO L93 Difference]: Finished difference Result 1221 states and 3760 transitions. [2021-07-13 19:49:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:07,748 INFO L225 Difference]: With dead ends: 1221 [2021-07-13 19:49:07,748 INFO L226 Difference]: Without dead ends: 1221 [2021-07-13 19:49:07,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-07-13 19:49:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 808. [2021-07-13 19:49:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.2862453531598512) internal successors, (2652), 807 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2652 transitions. [2021-07-13 19:49:07,760 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2652 transitions. Word has length 22 [2021-07-13 19:49:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:07,760 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2652 transitions. [2021-07-13 19:49:07,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2652 transitions. [2021-07-13 19:49:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:07,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:07,762 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:07,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8105,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:07,962 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1965068230, now seen corresponding path program 647 times [2021-07-13 19:49:07,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:07,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536487994] [2021-07-13 19:49:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536487994] [2021-07-13 19:49:08,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536487994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843494902] [2021-07-13 19:49:08,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:08,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:08,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:08,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843494902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007888393] [2021-07-13 19:49:08,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:08,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:08,611 INFO L87 Difference]: Start difference. First operand 808 states and 2652 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,059 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-13 19:49:09,248 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-07-13 19:49:09,439 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-07-13 19:49:09,616 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 19:49:09,801 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-13 19:49:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:09,835 INFO L93 Difference]: Finished difference Result 1227 states and 3767 transitions. [2021-07-13 19:49:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:09,837 INFO L225 Difference]: With dead ends: 1227 [2021-07-13 19:49:09,837 INFO L226 Difference]: Without dead ends: 1221 [2021-07-13 19:49:09,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1236.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-07-13 19:49:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 805. [2021-07-13 19:49:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.2848258706467663) internal successors, (2641), 804 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2641 transitions. [2021-07-13 19:49:09,849 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2641 transitions. Word has length 22 [2021-07-13 19:49:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:09,849 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2641 transitions. [2021-07-13 19:49:09,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2641 transitions. [2021-07-13 19:49:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:09,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:09,850 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:10,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8120 [2021-07-13 19:49:10,050 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1792043488, now seen corresponding path program 648 times [2021-07-13 19:49:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:10,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764921308] [2021-07-13 19:49:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:10,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:10,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764921308] [2021-07-13 19:49:10,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764921308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:10,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238411416] [2021-07-13 19:49:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:10,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:10,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238411416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:10,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:10,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522552640] [2021-07-13 19:49:10,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:10,673 INFO L87 Difference]: Start difference. First operand 805 states and 2641 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,076 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 19:49:11,257 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-13 19:49:11,459 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 19:49:11,643 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-07-13 19:49:11,803 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-13 19:49:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:11,823 INFO L93 Difference]: Finished difference Result 1191 states and 3685 transitions. [2021-07-13 19:49:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:11,825 INFO L225 Difference]: With dead ends: 1191 [2021-07-13 19:49:11,825 INFO L226 Difference]: Without dead ends: 1179 [2021-07-13 19:49:11,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1223.8ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-13 19:49:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 802. [2021-07-13 19:49:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.2833957553058677) internal successors, (2630), 801 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2630 transitions. [2021-07-13 19:49:11,837 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2630 transitions. Word has length 22 [2021-07-13 19:49:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:11,837 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2630 transitions. [2021-07-13 19:49:11,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2630 transitions. [2021-07-13 19:49:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:11,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:11,838 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:12,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8138 [2021-07-13 19:49:12,038 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1996577542, now seen corresponding path program 649 times [2021-07-13 19:49:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:12,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000126128] [2021-07-13 19:49:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:12,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000126128] [2021-07-13 19:49:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000126128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85737459] [2021-07-13 19:49:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:12,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:12,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85737459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:12,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:12,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016080266] [2021-07-13 19:49:12,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:12,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:12,621 INFO L87 Difference]: Start difference. First operand 802 states and 2630 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:13,585 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2021-07-13 19:49:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:13,587 INFO L225 Difference]: With dead ends: 1188 [2021-07-13 19:49:13,587 INFO L226 Difference]: Without dead ends: 1170 [2021-07-13 19:49:13,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 949.6ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-13 19:49:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 799. [2021-07-13 19:49:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.281954887218045) internal successors, (2619), 798 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2619 transitions. [2021-07-13 19:49:13,598 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2619 transitions. Word has length 22 [2021-07-13 19:49:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:13,598 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2619 transitions. [2021-07-13 19:49:13,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2619 transitions. [2021-07-13 19:49:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:13,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:13,599 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:13,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-07-13 19:49:13,800 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1258153956, now seen corresponding path program 650 times [2021-07-13 19:49:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:13,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735869181] [2021-07-13 19:49:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:13,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735869181] [2021-07-13 19:49:13,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735869181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097639139] [2021-07-13 19:49:13,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:14,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:14,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:14,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097639139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:14,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:14,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599512040] [2021-07-13 19:49:14,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:14,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:14,336 INFO L87 Difference]: Start difference. First operand 799 states and 2619 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,780 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 19:49:14,951 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-07-13 19:49:15,132 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-07-13 19:49:15,293 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-13 19:49:15,449 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 19:49:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:15,473 INFO L93 Difference]: Finished difference Result 1179 states and 3650 transitions. [2021-07-13 19:49:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:15,475 INFO L225 Difference]: With dead ends: 1179 [2021-07-13 19:49:15,475 INFO L226 Difference]: Without dead ends: 1155 [2021-07-13 19:49:15,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1113.0ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-07-13 19:49:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 799. [2021-07-13 19:49:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.2781954887218046) internal successors, (2616), 798 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2616 transitions. [2021-07-13 19:49:15,487 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2616 transitions. Word has length 22 [2021-07-13 19:49:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2616 transitions. [2021-07-13 19:49:15,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2616 transitions. [2021-07-13 19:49:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:15,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:15,488 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:15,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8165,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:15,689 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash 644309949, now seen corresponding path program 651 times [2021-07-13 19:49:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:15,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883113980] [2021-07-13 19:49:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:15,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883113980] [2021-07-13 19:49:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883113980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266049582] [2021-07-13 19:49:15,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:15,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:15,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:15,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:15,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:15,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:15,985 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:49:15,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:15,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:49:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:16,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266049582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:16,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:49:16,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195076059] [2021-07-13 19:49:16,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:16,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:16,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:16,030 INFO L87 Difference]: Start difference. First operand 799 states and 2616 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:16,430 INFO L93 Difference]: Finished difference Result 1303 states and 4070 transitions. [2021-07-13 19:49:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:16,432 INFO L225 Difference]: With dead ends: 1303 [2021-07-13 19:49:16,432 INFO L226 Difference]: Without dead ends: 1233 [2021-07-13 19:49:16,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-13 19:49:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 806. [2021-07-13 19:49:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2857142857142856) internal successors, (2645), 805 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-07-13 19:49:16,452 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-07-13 19:49:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:16,452 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-07-13 19:49:16,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-07-13 19:49:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:16,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:16,453 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:16,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8184 [2021-07-13 19:49:16,654 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -8767304, now seen corresponding path program 652 times [2021-07-13 19:49:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:16,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341843354] [2021-07-13 19:49:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:16,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341843354] [2021-07-13 19:49:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341843354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271988522] [2021-07-13 19:49:16,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:16,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:16,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:16,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:17,143 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_309, nondet_0], 1=[v_prenex_310, v_prenex_313]} [2021-07-13 19:49:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:17,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:17,195 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-07-13 19:49:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:17,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:17,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:17,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:17,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:17,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:17,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:17,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-07-13 19:49:17,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:17,245 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-13 19:49:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:17,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271988522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:17,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:17,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350947315] [2021-07-13 19:49:17,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:17,309 INFO L87 Difference]: Start difference. First operand 806 states and 2645 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:18,026 INFO L93 Difference]: Finished difference Result 1256 states and 3898 transitions. [2021-07-13 19:49:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:18,029 INFO L225 Difference]: With dead ends: 1256 [2021-07-13 19:49:18,029 INFO L226 Difference]: Without dead ends: 1256 [2021-07-13 19:49:18,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-07-13 19:49:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 821. [2021-07-13 19:49:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.273170731707317) internal successors, (2684), 820 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2684 transitions. [2021-07-13 19:49:18,042 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2684 transitions. Word has length 22 [2021-07-13 19:49:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:18,042 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2684 transitions. [2021-07-13 19:49:18,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2684 transitions. [2021-07-13 19:49:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:18,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:18,043 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:18,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8189 [2021-07-13 19:49:18,244 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1149876226, now seen corresponding path program 653 times [2021-07-13 19:49:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:18,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114388033] [2021-07-13 19:49:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:18,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114388033] [2021-07-13 19:49:18,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114388033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111761545] [2021-07-13 19:49:18,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:18,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:18,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:49:18,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:18,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:18,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:18,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:18,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:18,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:18,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-07-13 19:49:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111761545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:18,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709196053] [2021-07-13 19:49:18,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:18,879 INFO L87 Difference]: Start difference. First operand 821 states and 2684 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:19,711 INFO L93 Difference]: Finished difference Result 1308 states and 4019 transitions. [2021-07-13 19:49:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:19,714 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 19:49:19,714 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 19:49:19,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 19:49:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 824. [2021-07-13 19:49:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.27460510328068) internal successors, (2695), 823 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2695 transitions. [2021-07-13 19:49:19,726 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2695 transitions. Word has length 22 [2021-07-13 19:49:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:19,726 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2695 transitions. [2021-07-13 19:49:19,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2695 transitions. [2021-07-13 19:49:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:19,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:19,728 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:19,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8204 [2021-07-13 19:49:19,928 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash -344031496, now seen corresponding path program 654 times [2021-07-13 19:49:19,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:19,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709783333] [2021-07-13 19:49:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709783333] [2021-07-13 19:49:20,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709783333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717041807] [2021-07-13 19:49:20,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:20,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:20,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:20,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:20,425 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_327, v_prenex_323], 1=[nondet_0, v_prenex_324]} [2021-07-13 19:49:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:20,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,486 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-07-13 19:49:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:20,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:20,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:20,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:20,537 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-07-13 19:49:20,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:20,538 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-13 19:49:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717041807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:20,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112914211] [2021-07-13 19:49:20,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:20,597 INFO L87 Difference]: Start difference. First operand 824 states and 2695 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:21,332 INFO L93 Difference]: Finished difference Result 1265 states and 3916 transitions. [2021-07-13 19:49:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:21,334 INFO L225 Difference]: With dead ends: 1265 [2021-07-13 19:49:21,334 INFO L226 Difference]: Without dead ends: 1259 [2021-07-13 19:49:21,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-07-13 19:49:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 816. [2021-07-13 19:49:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.2773006134969327) internal successors, (2671), 815 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2671 transitions. [2021-07-13 19:49:21,346 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2671 transitions. Word has length 22 [2021-07-13 19:49:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:21,347 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2671 transitions. [2021-07-13 19:49:21,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2671 transitions. [2021-07-13 19:49:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:21,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:21,348 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:21,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8223 [2021-07-13 19:49:21,548 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2050999482, now seen corresponding path program 655 times [2021-07-13 19:49:21,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:21,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108993254] [2021-07-13 19:49:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:21,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108993254] [2021-07-13 19:49:21,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108993254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881064739] [2021-07-13 19:49:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:21,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881064739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:22,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249639782] [2021-07-13 19:49:22,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:22,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:22,218 INFO L87 Difference]: Start difference. First operand 816 states and 2671 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:23,075 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2021-07-13 19:49:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:23,077 INFO L225 Difference]: With dead ends: 1208 [2021-07-13 19:49:23,077 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:49:23,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 871.5ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:49:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 822. [2021-07-13 19:49:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.2801461632155906) internal successors, (2693), 821 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2693 transitions. [2021-07-13 19:49:23,089 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2693 transitions. Word has length 22 [2021-07-13 19:49:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:23,089 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2693 transitions. [2021-07-13 19:49:23,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2693 transitions. [2021-07-13 19:49:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:23,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:23,090 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:23,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8239,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:23,291 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 750060092, now seen corresponding path program 656 times [2021-07-13 19:49:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:23,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593425635] [2021-07-13 19:49:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593425635] [2021-07-13 19:49:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593425635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988775584] [2021-07-13 19:49:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:23,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988775584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:23,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:23,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477894650] [2021-07-13 19:49:23,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:23,930 INFO L87 Difference]: Start difference. First operand 822 states and 2693 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:24,761 INFO L93 Difference]: Finished difference Result 1214 states and 3758 transitions. [2021-07-13 19:49:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:24,763 INFO L225 Difference]: With dead ends: 1214 [2021-07-13 19:49:24,763 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:49:24,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 836.6ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:49:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 819. [2021-07-13 19:49:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.2787286063569683) internal successors, (2682), 818 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2682 transitions. [2021-07-13 19:49:24,776 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2682 transitions. Word has length 22 [2021-07-13 19:49:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:24,776 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2682 transitions. [2021-07-13 19:49:24,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2682 transitions. [2021-07-13 19:49:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:24,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:24,777 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:24,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8251,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:24,981 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1287915670, now seen corresponding path program 657 times [2021-07-13 19:49:24,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:24,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971273718] [2021-07-13 19:49:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:25,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971273718] [2021-07-13 19:49:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971273718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316111187] [2021-07-13 19:49:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:25,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316111187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:25,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622436925] [2021-07-13 19:49:25,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:25,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:25,634 INFO L87 Difference]: Start difference. First operand 819 states and 2682 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,305 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-07-13 19:49:26,498 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-13 19:49:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:26,585 INFO L93 Difference]: Finished difference Result 1172 states and 3663 transitions. [2021-07-13 19:49:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:26,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:26,587 INFO L225 Difference]: With dead ends: 1172 [2021-07-13 19:49:26,587 INFO L226 Difference]: Without dead ends: 1160 [2021-07-13 19:49:26,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-07-13 19:49:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 811. [2021-07-13 19:49:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.2814814814814817) internal successors, (2658), 810 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2658 transitions. [2021-07-13 19:49:26,598 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2658 transitions. Word has length 22 [2021-07-13 19:49:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:26,598 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2658 transitions. [2021-07-13 19:49:26,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2658 transitions. [2021-07-13 19:49:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:26,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:26,599 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:26,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8269 [2021-07-13 19:49:26,800 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1801068674, now seen corresponding path program 658 times [2021-07-13 19:49:26,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:26,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449046395] [2021-07-13 19:49:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:26,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449046395] [2021-07-13 19:49:26,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449046395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810545168] [2021-07-13 19:49:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:27,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810545168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:27,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276605496] [2021-07-13 19:49:27,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:27,441 INFO L87 Difference]: Start difference. First operand 811 states and 2658 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:27,980 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-07-13 19:49:28,121 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-13 19:49:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:28,330 INFO L93 Difference]: Finished difference Result 1197 states and 3719 transitions. [2021-07-13 19:49:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:28,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:28,333 INFO L225 Difference]: With dead ends: 1197 [2021-07-13 19:49:28,333 INFO L226 Difference]: Without dead ends: 1197 [2021-07-13 19:49:28,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 941.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-13 19:49:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 820. [2021-07-13 19:49:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.2857142857142856) internal successors, (2691), 819 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2691 transitions. [2021-07-13 19:49:28,344 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2691 transitions. Word has length 22 [2021-07-13 19:49:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:28,344 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2691 transitions. [2021-07-13 19:49:28,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2691 transitions. [2021-07-13 19:49:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:28,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:28,345 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:28,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8290,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:28,546 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 307160952, now seen corresponding path program 659 times [2021-07-13 19:49:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:28,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888542204] [2021-07-13 19:49:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:28,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:28,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888542204] [2021-07-13 19:49:28,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888542204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:28,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703917811] [2021-07-13 19:49:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:28,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:28,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703917811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:29,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:29,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:29,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024934007] [2021-07-13 19:49:29,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:29,187 INFO L87 Difference]: Start difference. First operand 820 states and 2691 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,739 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-07-13 19:49:29,881 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-13 19:49:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:30,085 INFO L93 Difference]: Finished difference Result 1203 states and 3726 transitions. [2021-07-13 19:49:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:30,087 INFO L225 Difference]: With dead ends: 1203 [2021-07-13 19:49:30,087 INFO L226 Difference]: Without dead ends: 1197 [2021-07-13 19:49:30,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-13 19:49:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 817. [2021-07-13 19:49:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.284313725490196) internal successors, (2680), 816 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2680 transitions. [2021-07-13 19:49:30,099 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2680 transitions. Word has length 22 [2021-07-13 19:49:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2680 transitions. [2021-07-13 19:49:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2680 transitions. [2021-07-13 19:49:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:30,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:30,100 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:30,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8302 [2021-07-13 19:49:30,300 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash 845016530, now seen corresponding path program 660 times [2021-07-13 19:49:30,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:30,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794603758] [2021-07-13 19:49:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794603758] [2021-07-13 19:49:30,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794603758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339622575] [2021-07-13 19:49:30,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:30,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339622575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:30,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:30,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383951130] [2021-07-13 19:49:30,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:30,965 INFO L87 Difference]: Start difference. First operand 817 states and 2680 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2021-07-13 19:49:31,752 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 19:49:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:31,838 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-07-13 19:49:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:31,840 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:49:31,840 INFO L226 Difference]: Without dead ends: 1155 [2021-07-13 19:49:31,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-07-13 19:49:31,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 814. [2021-07-13 19:49:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.2829028290282904) internal successors, (2669), 813 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2669 transitions. [2021-07-13 19:49:31,851 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2669 transitions. Word has length 22 [2021-07-13 19:49:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:31,851 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2669 transitions. [2021-07-13 19:49:31,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2669 transitions. [2021-07-13 19:49:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:31,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:31,852 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:32,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8316 [2021-07-13 19:49:32,053 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash 338670264, now seen corresponding path program 661 times [2021-07-13 19:49:32,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:32,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697794164] [2021-07-13 19:49:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:32,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697794164] [2021-07-13 19:49:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697794164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541517707] [2021-07-13 19:49:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541517707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:32,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:32,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132392200] [2021-07-13 19:49:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:32,660 INFO L87 Difference]: Start difference. First operand 814 states and 2669 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:33,505 INFO L93 Difference]: Finished difference Result 1158 states and 3620 transitions. [2021-07-13 19:49:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:33,507 INFO L225 Difference]: With dead ends: 1158 [2021-07-13 19:49:33,507 INFO L226 Difference]: Without dead ends: 1140 [2021-07-13 19:49:33,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-13 19:49:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 806. [2021-07-13 19:49:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2857142857142856) internal successors, (2645), 805 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-07-13 19:49:33,519 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-07-13 19:49:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:33,519 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-07-13 19:49:33,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-07-13 19:49:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:33,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:33,520 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:33,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8329,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:33,720 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1633724579, now seen corresponding path program 662 times [2021-07-13 19:49:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:33,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412807003] [2021-07-13 19:49:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:33,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412807003] [2021-07-13 19:49:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412807003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519898688] [2021-07-13 19:49:33,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:33,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:34,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:34,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:34,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:34,045 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:49:34,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:34,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:49:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519898688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:34,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:49:34,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848931295] [2021-07-13 19:49:34,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:34,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:34,095 INFO L87 Difference]: Start difference. First operand 806 states and 2645 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:34,554 INFO L93 Difference]: Finished difference Result 1193 states and 3775 transitions. [2021-07-13 19:49:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:34,556 INFO L225 Difference]: With dead ends: 1193 [2021-07-13 19:49:34,556 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:49:34,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:49:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 813. [2021-07-13 19:49:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-13 19:49:34,567 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-13 19:49:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:34,567 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-13 19:49:34,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-13 19:49:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:34,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:34,568 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:34,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-07-13 19:49:34,768 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -407865598, now seen corresponding path program 663 times [2021-07-13 19:49:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:34,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223706746] [2021-07-13 19:49:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223706746] [2021-07-13 19:49:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223706746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429430045] [2021-07-13 19:49:34,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:35,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:35,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:35,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:49:35,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:35,397 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:49:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:35,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:35,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:35,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:35,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:49:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429430045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:35,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:35,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816741531] [2021-07-13 19:49:35,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:35,471 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:36,341 INFO L93 Difference]: Finished difference Result 1258 states and 3914 transitions. [2021-07-13 19:49:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:36,344 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 19:49:36,344 INFO L226 Difference]: Without dead ends: 1258 [2021-07-13 19:49:36,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-07-13 19:49:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 823. [2021-07-13 19:49:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.2846715328467155) internal successors, (2700), 822 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2700 transitions. [2021-07-13 19:49:36,356 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2700 transitions. Word has length 22 [2021-07-13 19:49:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:36,356 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2700 transitions. [2021-07-13 19:49:36,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2700 transitions. [2021-07-13 19:49:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:36,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:36,358 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:36,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8347,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,573 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 750777932, now seen corresponding path program 664 times [2021-07-13 19:49:36,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:36,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938535340] [2021-07-13 19:49:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:36,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:36,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938535340] [2021-07-13 19:49:36,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938535340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:36,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665688651] [2021-07-13 19:49:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:37,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:49:37,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:37,196 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:49:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:37,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:37,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:37,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:37,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:37,206 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:49:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665688651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:37,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:37,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26237445] [2021-07-13 19:49:37,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:37,269 INFO L87 Difference]: Start difference. First operand 823 states and 2700 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:38,163 INFO L93 Difference]: Finished difference Result 1310 states and 4035 transitions. [2021-07-13 19:49:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:38,165 INFO L225 Difference]: With dead ends: 1310 [2021-07-13 19:49:38,165 INFO L226 Difference]: Without dead ends: 1310 [2021-07-13 19:49:38,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 850.0ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-07-13 19:49:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 826. [2021-07-13 19:49:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.286060606060606) internal successors, (2711), 825 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2711 transitions. [2021-07-13 19:49:38,178 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2711 transitions. Word has length 22 [2021-07-13 19:49:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:38,178 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2711 transitions. [2021-07-13 19:49:38,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2711 transitions. [2021-07-13 19:49:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:38,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:38,179 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:38,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-07-13 19:49:38,380 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash -743129790, now seen corresponding path program 665 times [2021-07-13 19:49:38,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:38,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538495686] [2021-07-13 19:49:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538495686] [2021-07-13 19:49:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538495686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71321687] [2021-07-13 19:49:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:38,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:38,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:38,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:38,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:38,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:38,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:38,996 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:49:38,996 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:49:38,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:38,997 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:49:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:39,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71321687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:39,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:39,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:39,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154459038] [2021-07-13 19:49:39,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:39,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:39,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:39,056 INFO L87 Difference]: Start difference. First operand 826 states and 2711 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:39,923 INFO L93 Difference]: Finished difference Result 1267 states and 3932 transitions. [2021-07-13 19:49:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:39,925 INFO L225 Difference]: With dead ends: 1267 [2021-07-13 19:49:39,925 INFO L226 Difference]: Without dead ends: 1261 [2021-07-13 19:49:39,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-13 19:49:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 818. [2021-07-13 19:49:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.2888616891064872) internal successors, (2687), 817 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2687 transitions. [2021-07-13 19:49:39,938 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2687 transitions. Word has length 22 [2021-07-13 19:49:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:39,938 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2687 transitions. [2021-07-13 19:49:39,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2687 transitions. [2021-07-13 19:49:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:39,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:39,939 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8389 [2021-07-13 19:49:40,140 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1844869520, now seen corresponding path program 666 times [2021-07-13 19:49:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:40,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437231532] [2021-07-13 19:49:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437231532] [2021-07-13 19:49:40,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437231532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221586028] [2021-07-13 19:49:40,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:40,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:49:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221586028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:40,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326568141] [2021-07-13 19:49:40,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:40,880 INFO L87 Difference]: Start difference. First operand 818 states and 2687 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,581 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2021-07-13 19:49:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:41,845 INFO L93 Difference]: Finished difference Result 1210 states and 3767 transitions. [2021-07-13 19:49:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:41,847 INFO L225 Difference]: With dead ends: 1210 [2021-07-13 19:49:41,847 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:49:41,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:49:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 824. [2021-07-13 19:49:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.2916160388821387) internal successors, (2709), 823 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2709 transitions. [2021-07-13 19:49:41,859 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2709 transitions. Word has length 22 [2021-07-13 19:49:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:41,860 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2709 transitions. [2021-07-13 19:49:41,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2709 transitions. [2021-07-13 19:49:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:41,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:41,861 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:42,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8408,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:42,061 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 350961798, now seen corresponding path program 667 times [2021-07-13 19:49:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:42,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542282169] [2021-07-13 19:49:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:42,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542282169] [2021-07-13 19:49:42,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542282169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418080370] [2021-07-13 19:49:42,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418080370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:42,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915163432] [2021-07-13 19:49:42,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:42,773 INFO L87 Difference]: Start difference. First operand 824 states and 2709 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,475 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-13 19:49:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:43,712 INFO L93 Difference]: Finished difference Result 1216 states and 3774 transitions. [2021-07-13 19:49:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:43,715 INFO L225 Difference]: With dead ends: 1216 [2021-07-13 19:49:43,715 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:49:43,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:49:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 821. [2021-07-13 19:49:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.290243902439024) internal successors, (2698), 820 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2698 transitions. [2021-07-13 19:49:43,735 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2698 transitions. Word has length 22 [2021-07-13 19:49:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:43,735 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2698 transitions. [2021-07-13 19:49:43,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2698 transitions. [2021-07-13 19:49:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:43,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:43,737 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:43,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8422 [2021-07-13 19:49:43,937 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:43,938 INFO L82 PathProgramCache]: Analyzing trace with hash 888817376, now seen corresponding path program 668 times [2021-07-13 19:49:43,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:43,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781883466] [2021-07-13 19:49:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:44,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:44,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781883466] [2021-07-13 19:49:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781883466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:44,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23163710] [2021-07-13 19:49:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:44,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:44,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23163710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:44,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:44,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:44,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036914077] [2021-07-13 19:49:44,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:44,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:44,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:44,707 INFO L87 Difference]: Start difference. First operand 821 states and 2698 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,357 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-07-13 19:49:45,501 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-07-13 19:49:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:45,587 INFO L93 Difference]: Finished difference Result 1174 states and 3679 transitions. [2021-07-13 19:49:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:45,590 INFO L225 Difference]: With dead ends: 1174 [2021-07-13 19:49:45,590 INFO L226 Difference]: Without dead ends: 1162 [2021-07-13 19:49:45,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 949.3ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-13 19:49:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 813. [2021-07-13 19:49:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-13 19:49:45,601 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-13 19:49:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:45,602 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-13 19:49:45,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-13 19:49:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:45,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:45,603 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:45,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8437,693 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:45,803 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash -875925571, now seen corresponding path program 669 times [2021-07-13 19:49:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:45,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465546815] [2021-07-13 19:49:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:45,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465546815] [2021-07-13 19:49:45,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465546815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555678877] [2021-07-13 19:49:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:46,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:49:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:49:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:46,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:46,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:46,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:46,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:46,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:46,090 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:46,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:46,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,120 INFO L628 ElimStorePlain]: treesize reduction 14, result has 66.7 percent of original size [2021-07-13 19:49:46,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:46,121 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-07-13 19:49:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555678877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:46,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:46,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:49:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063013246] [2021-07-13 19:49:46,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:49:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:49:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:49:46,184 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:46,682 INFO L93 Difference]: Finished difference Result 1284 states and 4007 transitions. [2021-07-13 19:49:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:46,685 INFO L225 Difference]: With dead ends: 1284 [2021-07-13 19:49:46,685 INFO L226 Difference]: Without dead ends: 1223 [2021-07-13 19:49:46,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-13 19:49:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 820. [2021-07-13 19:49:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.3089133089133087) internal successors, (2710), 819 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2710 transitions. [2021-07-13 19:49:46,696 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2710 transitions. Word has length 22 [2021-07-13 19:49:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:46,696 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2710 transitions. [2021-07-13 19:49:46,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2710 transitions. [2021-07-13 19:49:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:46,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:46,698 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:46,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8456,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:46,898 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash 133449592, now seen corresponding path program 670 times [2021-07-13 19:49:46,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:46,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843866548] [2021-07-13 19:49:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843866548] [2021-07-13 19:49:47,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843866548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042176540] [2021-07-13 19:49:47,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:47,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:47,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:47,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:47,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:47,461 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-07-13 19:49:47,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:47,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:47,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:47,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:47,502 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-07-13 19:49:47,502 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-07-13 19:49:47,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:47,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:49:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042176540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:47,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600784544] [2021-07-13 19:49:47,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:47,589 INFO L87 Difference]: Start difference. First operand 820 states and 2710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:48,344 INFO L93 Difference]: Finished difference Result 1417 states and 4388 transitions. [2021-07-13 19:49:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:48,347 INFO L225 Difference]: With dead ends: 1417 [2021-07-13 19:49:48,347 INFO L226 Difference]: Without dead ends: 1417 [2021-07-13 19:49:48,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-07-13 19:49:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 832. [2021-07-13 19:49:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.3104693140794224) internal successors, (2751), 831 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-07-13 19:49:48,370 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-07-13 19:49:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:48,370 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-07-13 19:49:48,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-07-13 19:49:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:48,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:48,371 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:48,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8463 [2021-07-13 19:49:48,572 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1292093122, now seen corresponding path program 671 times [2021-07-13 19:49:48,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:48,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679246359] [2021-07-13 19:49:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:48,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679246359] [2021-07-13 19:49:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679246359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892969162] [2021-07-13 19:49:48,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:48,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:48,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:48,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:49,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:49,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:49,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:49,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:49,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,167 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-07-13 19:49:49,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:49,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:49,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:49,190 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:49:49,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:49,191 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:49:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:49,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892969162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:49,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:49,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783019341] [2021-07-13 19:49:49,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:49,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:49,303 INFO L87 Difference]: Start difference. First operand 832 states and 2751 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:50,098 INFO L93 Difference]: Finished difference Result 1449 states and 4447 transitions. [2021-07-13 19:49:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:50,101 INFO L225 Difference]: With dead ends: 1449 [2021-07-13 19:49:50,101 INFO L226 Difference]: Without dead ends: 1449 [2021-07-13 19:49:50,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 763.2ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-07-13 19:49:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 838. [2021-07-13 19:49:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.3166069295101552) internal successors, (2776), 837 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2776 transitions. [2021-07-13 19:49:50,114 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2776 transitions. Word has length 22 [2021-07-13 19:49:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:50,114 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2776 transitions. [2021-07-13 19:49:50,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2776 transitions. [2021-07-13 19:49:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:50,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:50,116 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:50,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8483,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:50,316 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash -201814600, now seen corresponding path program 672 times [2021-07-13 19:49:50,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:50,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170649145] [2021-07-13 19:49:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170649145] [2021-07-13 19:49:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170649145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618575378] [2021-07-13 19:49:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:50,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:50,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:50,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:50,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:50,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,897 INFO L628 ElimStorePlain]: treesize reduction 48, result has 61.9 percent of original size [2021-07-13 19:49:50,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:50,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:50,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:50,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:50,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:50,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:50,969 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-07-13 19:49:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618575378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:51,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131452467] [2021-07-13 19:49:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:51,055 INFO L87 Difference]: Start difference. First operand 838 states and 2776 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:51,846 INFO L93 Difference]: Finished difference Result 1406 states and 4338 transitions. [2021-07-13 19:49:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:51,850 INFO L225 Difference]: With dead ends: 1406 [2021-07-13 19:49:51,850 INFO L226 Difference]: Without dead ends: 1400 [2021-07-13 19:49:51,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-13 19:49:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 830. [2021-07-13 19:49:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.319662243667069) internal successors, (2752), 829 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2752 transitions. [2021-07-13 19:49:51,868 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2752 transitions. Word has length 22 [2021-07-13 19:49:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,868 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2752 transitions. [2021-07-13 19:49:51,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2752 transitions. [2021-07-13 19:49:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:51,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:51,869 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8508,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,070 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 543962077, now seen corresponding path program 673 times [2021-07-13 19:49:52,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:52,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298244739] [2021-07-13 19:49:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298244739] [2021-07-13 19:49:52,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298244739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777117698] [2021-07-13 19:49:52,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:52,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:52,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:52,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:52,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,403 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-13 19:49:52,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:52,403 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-13 19:49:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777117698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:52,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:49:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023929686] [2021-07-13 19:49:52,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:52,469 INFO L87 Difference]: Start difference. First operand 830 states and 2752 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:52,961 INFO L93 Difference]: Finished difference Result 1192 states and 3728 transitions. [2021-07-13 19:49:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:52,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:52,964 INFO L225 Difference]: With dead ends: 1192 [2021-07-13 19:49:52,964 INFO L226 Difference]: Without dead ends: 1108 [2021-07-13 19:49:52,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-13 19:49:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 810. [2021-07-13 19:49:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.289245982694685) internal successors, (2661), 809 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2661 transitions. [2021-07-13 19:49:52,975 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2661 transitions. Word has length 22 [2021-07-13 19:49:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:52,975 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2661 transitions. [2021-07-13 19:49:52,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2661 transitions. [2021-07-13 19:49:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:52,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:52,976 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:53,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8530,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,177 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1952026690, now seen corresponding path program 674 times [2021-07-13 19:49:53,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:53,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157691274] [2021-07-13 19:49:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157691274] [2021-07-13 19:49:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157691274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545661948] [2021-07-13 19:49:53,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:53,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:53,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:53,683 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_426, v_prenex_421, v_prenex_422], 1=[v_prenex_428, nondet_0, v_prenex_423]} [2021-07-13 19:49:53,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:53,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,822 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:49:53,823 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-07-13 19:49:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:53,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:53,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:53,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:53,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:53,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:53,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:54,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:54,016 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:49:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:54,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:54,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:54,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:54,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:54,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:54,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:49:54,066 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-13 19:49:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:54,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545661948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:54,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:54,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:54,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160525020] [2021-07-13 19:49:54,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:54,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:54,161 INFO L87 Difference]: Start difference. First operand 810 states and 2661 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:54,979 INFO L93 Difference]: Finished difference Result 1340 states and 4171 transitions. [2021-07-13 19:49:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:54,982 INFO L225 Difference]: With dead ends: 1340 [2021-07-13 19:49:54,982 INFO L226 Difference]: Without dead ends: 1340 [2021-07-13 19:49:54,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 781.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-07-13 19:49:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 806. [2021-07-13 19:49:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.283229813664596) internal successors, (2643), 805 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-07-13 19:49:54,994 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 22 [2021-07-13 19:49:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:54,994 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-07-13 19:49:54,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-07-13 19:49:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:54,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:54,996 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:55,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8542 [2021-07-13 19:49:55,196 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -709889214, now seen corresponding path program 675 times [2021-07-13 19:49:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:55,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636566735] [2021-07-13 19:49:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:55,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636566735] [2021-07-13 19:49:55,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636566735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624003369] [2021-07-13 19:49:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:55,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:49:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:49:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:55,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:49:55,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:55,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:49:55,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:55,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:55,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:49:55,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:55,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:55,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:49:55,909 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:174, output treesize:61 [2021-07-13 19:49:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624003369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:56,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:56,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:49:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408440112] [2021-07-13 19:49:56,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:49:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:49:56,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:56,089 INFO L87 Difference]: Start difference. First operand 806 states and 2643 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,046 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 19:49:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:57,324 INFO L93 Difference]: Finished difference Result 1285 states and 4035 transitions. [2021-07-13 19:49:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:57,327 INFO L225 Difference]: With dead ends: 1285 [2021-07-13 19:49:57,327 INFO L226 Difference]: Without dead ends: 1264 [2021-07-13 19:49:57,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1237.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:49:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-13 19:49:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 800. [2021-07-13 19:49:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.2778473091364204) internal successors, (2619), 799 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2619 transitions. [2021-07-13 19:49:57,339 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2619 transitions. Word has length 22 [2021-07-13 19:49:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:57,339 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2619 transitions. [2021-07-13 19:49:57,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2619 transitions. [2021-07-13 19:49:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:57,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:57,341 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:57,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8559,700 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,541 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1378076080, now seen corresponding path program 676 times [2021-07-13 19:49:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018593505] [2021-07-13 19:49:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:57,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018593505] [2021-07-13 19:49:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018593505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762652224] [2021-07-13 19:49:57,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:58,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:58,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,086 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-07-13 19:49:58,086 INFO L518 ElimStorePlain]: Eliminatee v_prenex_440 vanished before elimination [2021-07-13 19:49:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:58,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:58,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:58,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:58,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:49:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762652224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:58,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:49:58,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901961833] [2021-07-13 19:49:58,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:58,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:58,204 INFO L87 Difference]: Start difference. First operand 800 states and 2619 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:59,040 INFO L93 Difference]: Finished difference Result 1364 states and 4234 transitions. [2021-07-13 19:49:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:49:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:59,042 INFO L225 Difference]: With dead ends: 1364 [2021-07-13 19:49:59,042 INFO L226 Difference]: Without dead ends: 1364 [2021-07-13 19:49:59,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 771.9ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-07-13 19:49:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 808. [2021-07-13 19:49:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.2899628252788102) internal successors, (2655), 807 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2655 transitions. [2021-07-13 19:49:59,055 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2655 transitions. Word has length 22 [2021-07-13 19:49:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:59,055 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2655 transitions. [2021-07-13 19:49:59,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2655 transitions. [2021-07-13 19:49:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:49:59,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:59,056 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:59,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8576 [2021-07-13 19:49:59,256 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1422983494, now seen corresponding path program 677 times [2021-07-13 19:49:59,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:59,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857832696] [2021-07-13 19:49:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857832696] [2021-07-13 19:49:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857832696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727405242] [2021-07-13 19:49:59,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:59,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:49:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:59,765 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_445], 1=[v_prenex_448, v_prenex_450, v_prenex_446]} [2021-07-13 19:49:59,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:59,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:59,856 INFO L628 ElimStorePlain]: treesize reduction 72, result has 56.9 percent of original size [2021-07-13 19:49:59,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:59,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:59,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:59,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:59,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:49:59,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:59,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:49:59,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:59,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:59,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:59,984 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-07-13 19:49:59,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_446 vanished before elimination [2021-07-13 19:49:59,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:49:59,985 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-07-13 19:50:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:00,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727405242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:00,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:00,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069818986] [2021-07-13 19:50:00,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:00,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:00,084 INFO L87 Difference]: Start difference. First operand 808 states and 2655 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:00,828 INFO L93 Difference]: Finished difference Result 1350 states and 4183 transitions. [2021-07-13 19:50:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:00,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:00,830 INFO L225 Difference]: With dead ends: 1350 [2021-07-13 19:50:00,831 INFO L226 Difference]: Without dead ends: 1344 [2021-07-13 19:50:00,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-13 19:50:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 805. [2021-07-13 19:50:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.288557213930348) internal successors, (2644), 804 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2644 transitions. [2021-07-13 19:50:00,843 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2644 transitions. Word has length 22 [2021-07-13 19:50:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:00,843 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2644 transitions. [2021-07-13 19:50:00,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2644 transitions. [2021-07-13 19:50:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:00,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:00,844 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:01,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8597,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:01,045 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash -626675642, now seen corresponding path program 678 times [2021-07-13 19:50:01,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:01,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94753897] [2021-07-13 19:50:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:01,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94753897] [2021-07-13 19:50:01,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94753897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665596795] [2021-07-13 19:50:01,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:01,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:01,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:01,605 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_460, v_prenex_455], 1=[nondet_0, v_prenex_456, v_prenex_457]} [2021-07-13 19:50:01,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:50:01,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,704 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-07-13 19:50:01,704 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-07-13 19:50:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:01,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:01,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:50:01,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:01,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:01,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,794 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-07-13 19:50:01,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_457 vanished before elimination [2021-07-13 19:50:01,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:50:01,795 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-07-13 19:50:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665596795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:01,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:01,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875379074] [2021-07-13 19:50:01,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:01,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:01,903 INFO L87 Difference]: Start difference. First operand 805 states and 2644 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:03,070 INFO L93 Difference]: Finished difference Result 1393 states and 4296 transitions. [2021-07-13 19:50:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:03,073 INFO L225 Difference]: With dead ends: 1393 [2021-07-13 19:50:03,073 INFO L226 Difference]: Without dead ends: 1372 [2021-07-13 19:50:03,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1083.3ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-13 19:50:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 801. [2021-07-13 19:50:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.28) internal successors, (2624), 800 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2624 transitions. [2021-07-13 19:50:03,088 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2624 transitions. Word has length 22 [2021-07-13 19:50:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:03,088 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2624 transitions. [2021-07-13 19:50:03,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2624 transitions. [2021-07-13 19:50:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:03,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:03,089 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:03,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8616 [2021-07-13 19:50:03,289 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash -605939114, now seen corresponding path program 679 times [2021-07-13 19:50:03,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:03,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901896035] [2021-07-13 19:50:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:03,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:03,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901896035] [2021-07-13 19:50:03,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901896035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390353045] [2021-07-13 19:50:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:03,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:03,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:03,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:03,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:03,881 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-07-13 19:50:03,881 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-07-13 19:50:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:03,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:03,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:03,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:03,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:50:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390353045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576140527] [2021-07-13 19:50:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:04,004 INFO L87 Difference]: Start difference. First operand 801 states and 2624 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:05,054 INFO L93 Difference]: Finished difference Result 1299 states and 4050 transitions. [2021-07-13 19:50:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:05,056 INFO L225 Difference]: With dead ends: 1299 [2021-07-13 19:50:05,056 INFO L226 Difference]: Without dead ends: 1272 [2021-07-13 19:50:05,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 999.2ms TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-13 19:50:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 803. [2021-07-13 19:50:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.2780548628428927) internal successors, (2629), 802 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2629 transitions. [2021-07-13 19:50:05,070 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2629 transitions. Word has length 22 [2021-07-13 19:50:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:05,070 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2629 transitions. [2021-07-13 19:50:05,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2629 transitions. [2021-07-13 19:50:05,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:05,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:05,071 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:05,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8635,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,272 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 674002882, now seen corresponding path program 680 times [2021-07-13 19:50:05,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:05,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038132621] [2021-07-13 19:50:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:05,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038132621] [2021-07-13 19:50:05,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038132621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992760125] [2021-07-13 19:50:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:05,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:05,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992760125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:06,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:06,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93702126] [2021-07-13 19:50:06,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:06,099 INFO L87 Difference]: Start difference. First operand 803 states and 2629 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:06,743 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-07-13 19:50:06,967 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-07-13 19:50:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:07,213 INFO L93 Difference]: Finished difference Result 1217 states and 3816 transitions. [2021-07-13 19:50:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:07,216 INFO L225 Difference]: With dead ends: 1217 [2021-07-13 19:50:07,216 INFO L226 Difference]: Without dead ends: 1217 [2021-07-13 19:50:07,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1183.3ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-13 19:50:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 810. [2021-07-13 19:50:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.2830655129789865) internal successors, (2656), 809 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2656 transitions. [2021-07-13 19:50:07,231 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2656 transitions. Word has length 22 [2021-07-13 19:50:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:07,231 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2656 transitions. [2021-07-13 19:50:07,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2656 transitions. [2021-07-13 19:50:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:07,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:07,233 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:07,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8660 [2021-07-13 19:50:07,433 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -819904840, now seen corresponding path program 681 times [2021-07-13 19:50:07,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:07,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938382858] [2021-07-13 19:50:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:07,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938382858] [2021-07-13 19:50:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938382858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64450114] [2021-07-13 19:50:07,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:07,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64450114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:08,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:08,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646479737] [2021-07-13 19:50:08,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:08,308 INFO L87 Difference]: Start difference. First operand 810 states and 2656 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,905 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-07-13 19:50:09,159 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-07-13 19:50:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:09,444 INFO L93 Difference]: Finished difference Result 1223 states and 3823 transitions. [2021-07-13 19:50:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:09,446 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 19:50:09,446 INFO L226 Difference]: Without dead ends: 1217 [2021-07-13 19:50:09,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1193.3ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-13 19:50:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 807. [2021-07-13 19:50:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.2816377171215882) internal successors, (2645), 806 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2645 transitions. [2021-07-13 19:50:09,459 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2645 transitions. Word has length 22 [2021-07-13 19:50:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:09,459 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2645 transitions. [2021-07-13 19:50:09,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2645 transitions. [2021-07-13 19:50:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:09,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:09,460 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:09,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8673 [2021-07-13 19:50:09,661 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash -282049262, now seen corresponding path program 682 times [2021-07-13 19:50:09,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:09,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022419859] [2021-07-13 19:50:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:09,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022419859] [2021-07-13 19:50:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022419859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503972356] [2021-07-13 19:50:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:09,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:10,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503972356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:10,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:10,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:10,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286123305] [2021-07-13 19:50:10,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:10,486 INFO L87 Difference]: Start difference. First operand 807 states and 2645 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,120 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-07-13 19:50:11,382 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-07-13 19:50:11,565 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2021-07-13 19:50:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:11,655 INFO L93 Difference]: Finished difference Result 1187 states and 3741 transitions. [2021-07-13 19:50:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:11,658 INFO L225 Difference]: With dead ends: 1187 [2021-07-13 19:50:11,658 INFO L226 Difference]: Without dead ends: 1175 [2021-07-13 19:50:11,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-13 19:50:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 804. [2021-07-13 19:50:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.2801992528019923) internal successors, (2634), 803 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-07-13 19:50:11,669 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-07-13 19:50:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:11,669 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-07-13 19:50:11,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-07-13 19:50:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:11,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:11,670 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:11,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8695 [2021-07-13 19:50:11,871 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1802387316, now seen corresponding path program 683 times [2021-07-13 19:50:11,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:11,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104354803] [2021-07-13 19:50:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104354803] [2021-07-13 19:50:12,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104354803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460668276] [2021-07-13 19:50:12,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:12,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:12,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:12,560 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 19:50:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:12,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:12,643 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:12,643 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:12,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:12,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460668276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:12,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632353892] [2021-07-13 19:50:12,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:12,723 INFO L87 Difference]: Start difference. First operand 804 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,333 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-07-13 19:50:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:13,719 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-07-13 19:50:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:13,722 INFO L225 Difference]: With dead ends: 1301 [2021-07-13 19:50:13,722 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 19:50:13,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1099.4ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 19:50:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 812. [2021-07-13 19:50:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.2922318125770653) internal successors, (2670), 811 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2670 transitions. [2021-07-13 19:50:13,739 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2670 transitions. Word has length 22 [2021-07-13 19:50:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:13,740 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2670 transitions. [2021-07-13 19:50:13,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2670 transitions. [2021-07-13 19:50:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:13,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:13,741 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:13,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:13,941 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 998672258, now seen corresponding path program 684 times [2021-07-13 19:50:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:13,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751198527] [2021-07-13 19:50:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:14,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751198527] [2021-07-13 19:50:14,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751198527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047869169] [2021-07-13 19:50:14,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:14,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:14,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:14,679 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:14,679 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-07-13 19:50:14,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:14,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047869169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:14,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634354902] [2021-07-13 19:50:14,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:14,759 INFO L87 Difference]: Start difference. First operand 812 states and 2670 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,345 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-07-13 19:50:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:15,721 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-07-13 19:50:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:15,723 INFO L225 Difference]: With dead ends: 1307 [2021-07-13 19:50:15,723 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 19:50:15,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 19:50:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 809. [2021-07-13 19:50:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.2908415841584158) internal successors, (2659), 808 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2659 transitions. [2021-07-13 19:50:15,736 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2659 transitions. Word has length 22 [2021-07-13 19:50:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:15,736 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2659 transitions. [2021-07-13 19:50:15,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2659 transitions. [2021-07-13 19:50:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:15,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:15,737 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:15,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8729,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:15,938 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1050986878, now seen corresponding path program 685 times [2021-07-13 19:50:15,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:15,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070763265] [2021-07-13 19:50:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:16,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070763265] [2021-07-13 19:50:16,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070763265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751289730] [2021-07-13 19:50:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:16,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:16,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:16,695 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-13 19:50:16,695 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:16,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:16,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:16,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751289730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:16,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:16,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:16,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067021677] [2021-07-13 19:50:16,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:16,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:16,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:16,778 INFO L87 Difference]: Start difference. First operand 809 states and 2659 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,385 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-07-13 19:50:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:17,979 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-07-13 19:50:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:17,981 INFO L225 Difference]: With dead ends: 1296 [2021-07-13 19:50:17,981 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 19:50:17,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1180.9ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 19:50:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 805. [2021-07-13 19:50:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.2823383084577116) internal successors, (2639), 804 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2639 transitions. [2021-07-13 19:50:17,994 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2639 transitions. Word has length 22 [2021-07-13 19:50:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:17,994 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2639 transitions. [2021-07-13 19:50:17,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2639 transitions. [2021-07-13 19:50:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:17,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:17,995 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:18,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8747,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:18,195 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1030250350, now seen corresponding path program 686 times [2021-07-13 19:50:18,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:18,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347391610] [2021-07-13 19:50:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:18,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:18,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347391610] [2021-07-13 19:50:18,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347391610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:18,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66924887] [2021-07-13 19:50:18,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:18,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:18,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:18,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:18,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:18,876 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-13 19:50:18,876 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:18,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:18,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:18,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66924887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:18,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:18,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:18,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114368765] [2021-07-13 19:50:18,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:18,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:18,961 INFO L87 Difference]: Start difference. First operand 805 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,535 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-07-13 19:50:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:19,963 INFO L93 Difference]: Finished difference Result 1252 states and 3909 transitions. [2021-07-13 19:50:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:19,965 INFO L225 Difference]: With dead ends: 1252 [2021-07-13 19:50:19,966 INFO L226 Difference]: Without dead ends: 1246 [2021-07-13 19:50:19,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1012.4ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:50:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-07-13 19:50:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 804. [2021-07-13 19:50:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.2801992528019923) internal successors, (2634), 803 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-07-13 19:50:19,985 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-07-13 19:50:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:19,985 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-07-13 19:50:19,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-07-13 19:50:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:19,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:19,987 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:20,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-07-13 19:50:20,187 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1245859330, now seen corresponding path program 687 times [2021-07-13 19:50:20,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:20,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826402960] [2021-07-13 19:50:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:20,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826402960] [2021-07-13 19:50:20,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826402960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458885755] [2021-07-13 19:50:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:20,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:20,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:20,882 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 19:50:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:21,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458885755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:21,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:21,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937384367] [2021-07-13 19:50:21,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:21,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:21,057 INFO L87 Difference]: Start difference. First operand 804 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,701 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-07-13 19:50:21,958 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2021-07-13 19:50:22,144 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-07-13 19:50:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:22,239 INFO L93 Difference]: Finished difference Result 1178 states and 3717 transitions. [2021-07-13 19:50:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:22,242 INFO L225 Difference]: With dead ends: 1178 [2021-07-13 19:50:22,242 INFO L226 Difference]: Without dead ends: 1166 [2021-07-13 19:50:22,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1308.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-13 19:50:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 806. [2021-07-13 19:50:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2782608695652176) internal successors, (2639), 805 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-07-13 19:50:22,253 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-07-13 19:50:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:22,254 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-07-13 19:50:22,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-07-13 19:50:22,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:22,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:22,255 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:22,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8785 [2021-07-13 19:50:22,456 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1997259768, now seen corresponding path program 688 times [2021-07-13 19:50:22,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:22,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110925833] [2021-07-13 19:50:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:22,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:22,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110925833] [2021-07-13 19:50:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110925833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:22,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952642870] [2021-07-13 19:50:22,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:22,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:22,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:23,161 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-13 19:50:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:23,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:23,299 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-13 19:50:23,299 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:23,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:23,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-13 19:50:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:23,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952642870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:23,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:23,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182385405] [2021-07-13 19:50:23,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:23,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:23,349 INFO L87 Difference]: Start difference. First operand 806 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,994 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-07-13 19:50:24,224 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-13 19:50:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:24,586 INFO L93 Difference]: Finished difference Result 1201 states and 3767 transitions. [2021-07-13 19:50:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:24,589 INFO L225 Difference]: With dead ends: 1201 [2021-07-13 19:50:24,589 INFO L226 Difference]: Without dead ends: 1174 [2021-07-13 19:50:24,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-07-13 19:50:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 806. [2021-07-13 19:50:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2782608695652176) internal successors, (2639), 805 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-07-13 19:50:24,601 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-07-13 19:50:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:24,601 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-07-13 19:50:24,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-07-13 19:50:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:24,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:24,602 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:24,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8803,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:24,803 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash -136058736, now seen corresponding path program 689 times [2021-07-13 19:50:24,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:24,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822775607] [2021-07-13 19:50:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822775607] [2021-07-13 19:50:24,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822775607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767426072] [2021-07-13 19:50:24,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:25,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767426072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:25,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:25,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758257548] [2021-07-13 19:50:25,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:25,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:25,584 INFO L87 Difference]: Start difference. First operand 806 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,117 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-07-13 19:50:26,319 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2021-07-13 19:50:26,496 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-13 19:50:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:26,742 INFO L93 Difference]: Finished difference Result 1214 states and 3807 transitions. [2021-07-13 19:50:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:26,744 INFO L225 Difference]: With dead ends: 1214 [2021-07-13 19:50:26,744 INFO L226 Difference]: Without dead ends: 1214 [2021-07-13 19:50:26,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1174.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-07-13 19:50:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 816. [2021-07-13 19:50:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.2846625766871167) internal successors, (2677), 815 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2677 transitions. [2021-07-13 19:50:26,763 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2677 transitions. Word has length 22 [2021-07-13 19:50:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:26,763 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2677 transitions. [2021-07-13 19:50:26,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2677 transitions. [2021-07-13 19:50:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:26,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:26,764 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:26,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8835,714 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:26,965 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1629966458, now seen corresponding path program 690 times [2021-07-13 19:50:26,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:26,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413608805] [2021-07-13 19:50:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413608805] [2021-07-13 19:50:27,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413608805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949100387] [2021-07-13 19:50:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:27,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:27,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:27,526 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-13 19:50:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949100387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:27,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:27,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508890960] [2021-07-13 19:50:27,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:27,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:27,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:27,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:27,752 INFO L87 Difference]: Start difference. First operand 816 states and 2677 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,236 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-07-13 19:50:28,437 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-07-13 19:50:28,611 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-13 19:50:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:28,841 INFO L93 Difference]: Finished difference Result 1220 states and 3814 transitions. [2021-07-13 19:50:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:28,843 INFO L225 Difference]: With dead ends: 1220 [2021-07-13 19:50:28,843 INFO L226 Difference]: Without dead ends: 1214 [2021-07-13 19:50:28,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1191.4ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-07-13 19:50:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 813. [2021-07-13 19:50:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.2832512315270934) internal successors, (2666), 812 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2666 transitions. [2021-07-13 19:50:28,855 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2666 transitions. Word has length 22 [2021-07-13 19:50:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:28,856 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2666 transitions. [2021-07-13 19:50:28,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2666 transitions. [2021-07-13 19:50:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:28,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:28,857 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:29,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8850 [2021-07-13 19:50:29,057 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1092110880, now seen corresponding path program 691 times [2021-07-13 19:50:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:29,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681921328] [2021-07-13 19:50:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:29,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681921328] [2021-07-13 19:50:29,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681921328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424768184] [2021-07-13 19:50:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:29,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424768184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:29,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:29,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695023075] [2021-07-13 19:50:29,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:29,829 INFO L87 Difference]: Start difference. First operand 813 states and 2666 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,357 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-13 19:50:30,556 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2021-07-13 19:50:30,734 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-13 19:50:30,886 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 19:50:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:30,978 INFO L93 Difference]: Finished difference Result 1184 states and 3732 transitions. [2021-07-13 19:50:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:30,980 INFO L225 Difference]: With dead ends: 1184 [2021-07-13 19:50:30,980 INFO L226 Difference]: Without dead ends: 1172 [2021-07-13 19:50:30,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1210.5ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-07-13 19:50:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 810. [2021-07-13 19:50:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.2818294190358466) internal successors, (2655), 809 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2655 transitions. [2021-07-13 19:50:30,992 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2655 transitions. Word has length 22 [2021-07-13 19:50:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:30,992 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2655 transitions. [2021-07-13 19:50:30,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2655 transitions. [2021-07-13 19:50:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:30,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:30,993 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:31,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8867,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:31,194 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1598457146, now seen corresponding path program 692 times [2021-07-13 19:50:31,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:31,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823635520] [2021-07-13 19:50:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823635520] [2021-07-13 19:50:31,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823635520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158106781] [2021-07-13 19:50:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:31,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158106781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:31,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236769356] [2021-07-13 19:50:31,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:31,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:31,939 INFO L87 Difference]: Start difference. First operand 810 states and 2655 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,458 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-13 19:50:32,654 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-07-13 19:50:32,837 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 59 [2021-07-13 19:50:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:33,027 INFO L93 Difference]: Finished difference Result 1181 states and 3721 transitions. [2021-07-13 19:50:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:33,029 INFO L225 Difference]: With dead ends: 1181 [2021-07-13 19:50:33,029 INFO L226 Difference]: Without dead ends: 1163 [2021-07-13 19:50:33,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1135.2ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-13 19:50:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 807. [2021-07-13 19:50:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.2803970223325063) internal successors, (2644), 806 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2644 transitions. [2021-07-13 19:50:33,044 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2644 transitions. Word has length 22 [2021-07-13 19:50:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:33,044 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2644 transitions. [2021-07-13 19:50:33,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2644 transitions. [2021-07-13 19:50:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:33,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:33,045 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:33,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8890,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,246 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash 405256454, now seen corresponding path program 693 times [2021-07-13 19:50:33,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:33,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367173681] [2021-07-13 19:50:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367173681] [2021-07-13 19:50:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367173681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93196501] [2021-07-13 19:50:33,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:33,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93196501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:34,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:34,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980693656] [2021-07-13 19:50:34,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:34,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:34,102 INFO L87 Difference]: Start difference. First operand 807 states and 2644 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:34,607 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-07-13 19:50:34,822 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-13 19:50:35,079 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2021-07-13 19:50:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:35,343 INFO L93 Difference]: Finished difference Result 1223 states and 3829 transitions. [2021-07-13 19:50:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:35,346 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 19:50:35,346 INFO L226 Difference]: Without dead ends: 1223 [2021-07-13 19:50:35,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1313.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-13 19:50:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 814. [2021-07-13 19:50:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.2853628536285364) internal successors, (2671), 813 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2671 transitions. [2021-07-13 19:50:35,359 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2671 transitions. Word has length 22 [2021-07-13 19:50:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:35,359 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2671 transitions. [2021-07-13 19:50:35,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2671 transitions. [2021-07-13 19:50:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:35,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:35,360 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:35,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8908,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,561 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1088651268, now seen corresponding path program 694 times [2021-07-13 19:50:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:35,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856161947] [2021-07-13 19:50:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:35,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:35,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856161947] [2021-07-13 19:50:35,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856161947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:35,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892379198] [2021-07-13 19:50:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:36,209 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-13 19:50:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:36,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892379198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:36,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:36,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122200814] [2021-07-13 19:50:36,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:36,480 INFO L87 Difference]: Start difference. First operand 814 states and 2671 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,000 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-13 19:50:37,241 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-07-13 19:50:37,457 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-07-13 19:50:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:37,711 INFO L93 Difference]: Finished difference Result 1229 states and 3836 transitions. [2021-07-13 19:50:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:37,713 INFO L225 Difference]: With dead ends: 1229 [2021-07-13 19:50:37,713 INFO L226 Difference]: Without dead ends: 1223 [2021-07-13 19:50:37,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1362.9ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-13 19:50:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-07-13 19:50:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.2839506172839505) internal successors, (2660), 810 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2660 transitions. [2021-07-13 19:50:37,726 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2660 transitions. Word has length 22 [2021-07-13 19:50:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:37,726 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2660 transitions. [2021-07-13 19:50:37,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2660 transitions. [2021-07-13 19:50:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:37,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:37,728 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:37,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8925 [2021-07-13 19:50:37,928 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash -550795690, now seen corresponding path program 695 times [2021-07-13 19:50:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657877675] [2021-07-13 19:50:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:38,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657877675] [2021-07-13 19:50:38,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657877675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314339878] [2021-07-13 19:50:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:38,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:38,570 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 19:50:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314339878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428503142] [2021-07-13 19:50:38,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:38,840 INFO L87 Difference]: Start difference. First operand 811 states and 2660 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,355 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-07-13 19:50:39,591 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-13 19:50:39,811 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-07-13 19:50:39,995 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2021-07-13 19:50:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:40,091 INFO L93 Difference]: Finished difference Result 1193 states and 3754 transitions. [2021-07-13 19:50:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:40,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:40,094 INFO L225 Difference]: With dead ends: 1193 [2021-07-13 19:50:40,094 INFO L226 Difference]: Without dead ends: 1181 [2021-07-13 19:50:40,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1411.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-13 19:50:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 808. [2021-07-13 19:50:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.282527881040892) internal successors, (2649), 807 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2649 transitions. [2021-07-13 19:50:40,107 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2649 transitions. Word has length 22 [2021-07-13 19:50:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:40,107 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2649 transitions. [2021-07-13 19:50:40,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2649 transitions. [2021-07-13 19:50:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:40,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:40,108 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:40,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8946,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:40,309 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2071133744, now seen corresponding path program 696 times [2021-07-13 19:50:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:40,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992966186] [2021-07-13 19:50:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:40,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992966186] [2021-07-13 19:50:40,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992966186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459157741] [2021-07-13 19:50:40,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:40,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:40,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:41,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:41,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:41,040 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:41,040 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:41,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:41,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:41,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459157741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:41,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:41,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:41,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847895054] [2021-07-13 19:50:41,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:41,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:41,126 INFO L87 Difference]: Start difference. First operand 808 states and 2649 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,607 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-07-13 19:50:41,818 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-13 19:50:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:42,211 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-07-13 19:50:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:42,214 INFO L225 Difference]: With dead ends: 1301 [2021-07-13 19:50:42,214 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 19:50:42,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1127.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 19:50:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 816. [2021-07-13 19:50:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.294478527607362) internal successors, (2685), 815 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2685 transitions. [2021-07-13 19:50:42,228 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2685 transitions. Word has length 22 [2021-07-13 19:50:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:42,228 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2685 transitions. [2021-07-13 19:50:42,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2685 transitions. [2021-07-13 19:50:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:42,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:42,229 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:42,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8964,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,429 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:42,430 INFO L82 PathProgramCache]: Analyzing trace with hash 729925830, now seen corresponding path program 697 times [2021-07-13 19:50:42,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:42,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463978245] [2021-07-13 19:50:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463978245] [2021-07-13 19:50:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463978245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945099959] [2021-07-13 19:50:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:43,045 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-13 19:50:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:43,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:43,222 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:43,222 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:43,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:43,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:43,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945099959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:43,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:43,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:43,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601422155] [2021-07-13 19:50:43,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:43,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:43,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:43,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:43,303 INFO L87 Difference]: Start difference. First operand 816 states and 2685 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,789 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-07-13 19:50:44,002 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-07-13 19:50:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:44,394 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-07-13 19:50:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:44,397 INFO L225 Difference]: With dead ends: 1307 [2021-07-13 19:50:44,397 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 19:50:44,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 19:50:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 813. [2021-07-13 19:50:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-13 19:50:44,411 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-13 19:50:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:44,411 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-13 19:50:44,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-13 19:50:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:44,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:44,412 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:44,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8980,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,613 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1319733306, now seen corresponding path program 698 times [2021-07-13 19:50:44,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:44,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148474042] [2021-07-13 19:50:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:44,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148474042] [2021-07-13 19:50:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148474042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537957718] [2021-07-13 19:50:44,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:44,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:45,185 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 19:50:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:45,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:45,360 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:45,360 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:45,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:45,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537957718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:45,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231454140] [2021-07-13 19:50:45,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:45,446 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,930 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-07-13 19:50:46,141 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-13 19:50:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,775 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-07-13 19:50:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:46,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,778 INFO L225 Difference]: With dead ends: 1296 [2021-07-13 19:50:46,778 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 19:50:46,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1323.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 19:50:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 809. [2021-07-13 19:50:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.2846534653465347) internal successors, (2654), 808 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2654 transitions. [2021-07-13 19:50:46,790 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2654 transitions. Word has length 22 [2021-07-13 19:50:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,790 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2654 transitions. [2021-07-13 19:50:46,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2654 transitions. [2021-07-13 19:50:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:46,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,791 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:46,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9004 [2021-07-13 19:50:46,992 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1298996778, now seen corresponding path program 699 times [2021-07-13 19:50:46,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:46,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848565039] [2021-07-13 19:50:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:47,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848565039] [2021-07-13 19:50:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848565039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31170485] [2021-07-13 19:50:47,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:47,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:50:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:48,001 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_613, v_prenex_603, v_prenex_604, v_prenex_605, v_prenex_609, v_prenex_612], 1=[v_prenex_608, nondet_0, v_prenex_611]} [2021-07-13 19:50:48,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:50:48,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,165 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-13 19:50:48,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:48,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,329 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 19:50:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:50:48,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,487 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 19:50:48,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:48,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,641 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 19:50:48,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:48,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,793 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 19:50:48,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:48,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,951 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 19:50:48,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 19:50:48,966 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,105 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 19:50:49,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 19:50:49,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,254 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 19:50:49,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:50:49,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-07-13 19:50:49,268 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,399 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 19:50:49,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 9 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 19:50:49,405 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:157 [2021-07-13 19:50:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31170485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:49,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:50:49,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152648834] [2021-07-13 19:50:49,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:50:49,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:50:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:49,647 INFO L87 Difference]: Start difference. First operand 809 states and 2654 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,296 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-13 19:50:50,539 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-13 19:50:50,779 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-07-13 19:50:51,017 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-07-13 19:50:51,321 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-07-13 19:50:51,592 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2021-07-13 19:50:51,979 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-07-13 19:50:52,332 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-07-13 19:50:52,692 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-07-13 19:50:52,978 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 108 [2021-07-13 19:50:53,460 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-07-13 19:50:53,720 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-07-13 19:50:53,979 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-07-13 19:50:54,123 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-13 19:50:54,363 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2021-07-13 19:50:54,591 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-07-13 19:50:54,735 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-13 19:50:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:54,818 INFO L93 Difference]: Finished difference Result 1681 states and 5049 transitions. [2021-07-13 19:50:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:50:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:54,821 INFO L225 Difference]: With dead ends: 1681 [2021-07-13 19:50:54,821 INFO L226 Difference]: Without dead ends: 1572 [2021-07-13 19:50:54,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5101.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:50:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-07-13 19:50:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 835. [2021-07-13 19:50:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.305755395683453) internal successors, (2757), 834 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-07-13 19:50:54,835 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-07-13 19:50:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:54,835 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-07-13 19:50:54,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-07-13 19:50:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:54,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:54,836 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:55,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9019 [2021-07-13 19:50:55,037 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1080546592, now seen corresponding path program 700 times [2021-07-13 19:50:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:55,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870514538] [2021-07-13 19:50:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870514538] [2021-07-13 19:50:55,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870514538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852111912] [2021-07-13 19:50:55,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:55,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:55,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:50:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,648 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-13 19:50:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:50:55,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:55,846 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:50:55,846 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:50:55,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:55,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:50:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852111912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:50:55,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503727910] [2021-07-13 19:50:55,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:55,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:55,934 INFO L87 Difference]: Start difference. First operand 835 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,486 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-13 19:50:56,731 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-13 19:50:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:57,138 INFO L93 Difference]: Finished difference Result 1278 states and 4004 transitions. [2021-07-13 19:50:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:57,140 INFO L225 Difference]: With dead ends: 1278 [2021-07-13 19:50:57,140 INFO L226 Difference]: Without dead ends: 1278 [2021-07-13 19:50:57,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-07-13 19:50:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 833. [2021-07-13 19:50:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-13 19:50:57,153 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-13 19:50:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:57,153 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-13 19:50:57,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-13 19:50:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:57,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:57,154 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:57,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9040,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,355 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash 977112902, now seen corresponding path program 701 times [2021-07-13 19:50:57,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:57,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543508308] [2021-07-13 19:50:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543508308] [2021-07-13 19:50:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543508308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580053797] [2021-07-13 19:50:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:50:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580053797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:58,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:50:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655989138] [2021-07-13 19:50:58,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:50:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:50:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:58,286 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,790 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-13 19:50:59,011 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2021-07-13 19:50:59,338 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 59 [2021-07-13 19:50:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:59,543 INFO L93 Difference]: Finished difference Result 1233 states and 3881 transitions. [2021-07-13 19:50:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:50:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:59,546 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:50:59,546 INFO L226 Difference]: Without dead ends: 1200 [2021-07-13 19:50:59,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1459.5ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-13 19:50:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 835. [2021-07-13 19:50:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.305755395683453) internal successors, (2757), 834 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-07-13 19:50:59,559 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-07-13 19:50:59,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:59,559 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-07-13 19:50:59,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-07-13 19:50:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:50:59,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:59,561 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:59,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9057 [2021-07-13 19:50:59,761 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1728513340, now seen corresponding path program 702 times [2021-07-13 19:50:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:59,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543657061] [2021-07-13 19:50:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:59,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543657061] [2021-07-13 19:50:59,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543657061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962676807] [2021-07-13 19:50:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:00,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:00,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:00,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:00,554 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-13 19:51:00,554 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:00,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:00,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-13 19:51:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962676807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:00,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:00,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:00,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584501574] [2021-07-13 19:51:00,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:00,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:00,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:00,604 INFO L87 Difference]: Start difference. First operand 835 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,064 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-07-13 19:51:01,279 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-07-13 19:51:01,567 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2021-07-13 19:51:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:01,813 INFO L93 Difference]: Finished difference Result 1214 states and 3839 transitions. [2021-07-13 19:51:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:51:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:01,815 INFO L225 Difference]: With dead ends: 1214 [2021-07-13 19:51:01,815 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:51:01,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:51:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:51:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 833. [2021-07-13 19:51:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-13 19:51:01,827 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-13 19:51:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:01,827 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-13 19:51:01,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-13 19:51:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:01,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:01,828 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:02,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9072,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,028 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1477931050, now seen corresponding path program 703 times [2021-07-13 19:51:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:02,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706955365] [2021-07-13 19:51:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:02,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706955365] [2021-07-13 19:51:02,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706955365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744443260] [2021-07-13 19:51:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744443260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:02,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565884139] [2021-07-13 19:51:02,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:02,745 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,233 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-13 19:51:03,523 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-07-13 19:51:03,689 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2021-07-13 19:51:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:03,871 INFO L93 Difference]: Finished difference Result 1201 states and 3804 transitions. [2021-07-13 19:51:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:03,873 INFO L225 Difference]: With dead ends: 1201 [2021-07-13 19:51:03,873 INFO L226 Difference]: Without dead ends: 1183 [2021-07-13 19:51:03,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-13 19:51:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-07-13 19:51:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3052884615384617) internal successors, (2750), 832 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2750 transitions. [2021-07-13 19:51:03,885 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2750 transitions. Word has length 22 [2021-07-13 19:51:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:03,885 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2750 transitions. [2021-07-13 19:51:03,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2750 transitions. [2021-07-13 19:51:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:03,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:03,886 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:04,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9098,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:04,087 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash 340646048, now seen corresponding path program 704 times [2021-07-13 19:51:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113090575] [2021-07-13 19:51:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:04,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:04,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113090575] [2021-07-13 19:51:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113090575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:04,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423012487] [2021-07-13 19:51:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:04,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:04,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:04,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423012487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:04,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:04,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:04,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131847259] [2021-07-13 19:51:04,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:04,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:04,858 INFO L87 Difference]: Start difference. First operand 833 states and 2750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,352 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-13 19:51:05,579 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-07-13 19:51:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:05,918 INFO L93 Difference]: Finished difference Result 1195 states and 3789 transitions. [2021-07-13 19:51:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:05,920 INFO L225 Difference]: With dead ends: 1195 [2021-07-13 19:51:05,920 INFO L226 Difference]: Without dead ends: 1183 [2021-07-13 19:51:05,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1157.1ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-13 19:51:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-07-13 19:51:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3028846153846154) internal successors, (2748), 832 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2748 transitions. [2021-07-13 19:51:05,932 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2748 transitions. Word has length 22 [2021-07-13 19:51:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:05,933 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2748 transitions. [2021-07-13 19:51:05,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2748 transitions. [2021-07-13 19:51:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:05,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:05,934 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:06,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9111,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:06,134 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1092046486, now seen corresponding path program 705 times [2021-07-13 19:51:06,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:06,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253993954] [2021-07-13 19:51:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253993954] [2021-07-13 19:51:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253993954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844843033] [2021-07-13 19:51:06,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:06,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:06,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:51:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:51:06,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:06,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 19:51:06,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:07,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:07,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 19:51:07,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:51:07,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:07,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:51:07,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,135 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:51:07,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-07-13 19:51:07,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:07,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:51:07,210 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:207, output treesize:84 [2021-07-13 19:51:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844843033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:07,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:07,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:51:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363021687] [2021-07-13 19:51:07,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:07,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:07,345 INFO L87 Difference]: Start difference. First operand 833 states and 2748 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:07,885 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-13 19:51:08,103 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-13 19:51:08,255 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-13 19:51:08,821 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-07-13 19:51:08,969 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-13 19:51:09,192 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-13 19:51:09,353 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-07-13 19:51:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:09,385 INFO L93 Difference]: Finished difference Result 1371 states and 4260 transitions. [2021-07-13 19:51:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:09,388 INFO L225 Difference]: With dead ends: 1371 [2021-07-13 19:51:09,388 INFO L226 Difference]: Without dead ends: 1344 [2021-07-13 19:51:09,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2163.8ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:51:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-13 19:51:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 833. [2021-07-13 19:51:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.300480769230769) internal successors, (2746), 832 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2746 transitions. [2021-07-13 19:51:09,401 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2746 transitions. Word has length 22 [2021-07-13 19:51:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:09,401 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2746 transitions. [2021-07-13 19:51:09,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2746 transitions. [2021-07-13 19:51:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:09,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:09,402 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:09,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9125 [2021-07-13 19:51:09,602 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:09,602 INFO L82 PathProgramCache]: Analyzing trace with hash -823377440, now seen corresponding path program 706 times [2021-07-13 19:51:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:09,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588760033] [2021-07-13 19:51:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:09,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588760033] [2021-07-13 19:51:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588760033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603011253] [2021-07-13 19:51:09,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:09,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:09,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:10,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:10,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:10,344 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-13 19:51:10,344 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:10,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:10,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-13 19:51:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:10,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603011253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384563527] [2021-07-13 19:51:10,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:10,392 INFO L87 Difference]: Start difference. First operand 833 states and 2746 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:10,888 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-07-13 19:51:11,156 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-13 19:51:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:11,455 INFO L93 Difference]: Finished difference Result 1189 states and 3780 transitions. [2021-07-13 19:51:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:11,458 INFO L225 Difference]: With dead ends: 1189 [2021-07-13 19:51:11,458 INFO L226 Difference]: Without dead ends: 1189 [2021-07-13 19:51:11,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-07-13 19:51:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 829. [2021-07-13 19:51:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.3043478260869565) internal successors, (2736), 828 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2736 transitions. [2021-07-13 19:51:11,469 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2736 transitions. Word has length 22 [2021-07-13 19:51:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:11,469 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2736 transitions. [2021-07-13 19:51:11,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2736 transitions. [2021-07-13 19:51:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:11,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:11,471 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:11,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9166 [2021-07-13 19:51:11,671 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash -757398910, now seen corresponding path program 707 times [2021-07-13 19:51:11,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:11,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831640039] [2021-07-13 19:51:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:11,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:11,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831640039] [2021-07-13 19:51:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831640039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:11,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154601080] [2021-07-13 19:51:11,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:11,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:11,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:11,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:12,176 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-13 19:51:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:12,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154601080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:12,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:12,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254876223] [2021-07-13 19:51:12,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:12,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:12,438 INFO L87 Difference]: Start difference. First operand 829 states and 2736 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:12,789 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-07-13 19:51:12,978 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-07-13 19:51:13,170 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2021-07-13 19:51:13,353 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-07-13 19:51:13,524 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2021-07-13 19:51:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:13,714 INFO L93 Difference]: Finished difference Result 1414 states and 4401 transitions. [2021-07-13 19:51:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:13,716 INFO L225 Difference]: With dead ends: 1414 [2021-07-13 19:51:13,716 INFO L226 Difference]: Without dead ends: 1414 [2021-07-13 19:51:13,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1342.2ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-13 19:51:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 842. [2021-07-13 19:51:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.3115338882282996) internal successors, (2785), 841 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2785 transitions. [2021-07-13 19:51:13,730 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2785 transitions. Word has length 22 [2021-07-13 19:51:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:13,730 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2785 transitions. [2021-07-13 19:51:13,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2785 transitions. [2021-07-13 19:51:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:13,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:13,731 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:13,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9191,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:13,932 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2043660664, now seen corresponding path program 708 times [2021-07-13 19:51:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:13,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744643846] [2021-07-13 19:51:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744643846] [2021-07-13 19:51:14,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744643846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630296852] [2021-07-13 19:51:14,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:14,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630296852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:14,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459429005] [2021-07-13 19:51:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:14,689 INFO L87 Difference]: Start difference. First operand 842 states and 2785 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,064 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-07-13 19:51:15,247 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2021-07-13 19:51:15,435 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2021-07-13 19:51:15,670 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-13 19:51:15,839 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-07-13 19:51:16,013 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-07-13 19:51:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:16,050 INFO L93 Difference]: Finished difference Result 1420 states and 4408 transitions. [2021-07-13 19:51:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:16,052 INFO L225 Difference]: With dead ends: 1420 [2021-07-13 19:51:16,052 INFO L226 Difference]: Without dead ends: 1414 [2021-07-13 19:51:16,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-13 19:51:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 839. [2021-07-13 19:51:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.3102625298329356) internal successors, (2774), 838 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2774 transitions. [2021-07-13 19:51:16,066 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2774 transitions. Word has length 22 [2021-07-13 19:51:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:16,066 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2774 transitions. [2021-07-13 19:51:16,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2774 transitions. [2021-07-13 19:51:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:16,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:16,067 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:16,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9207,733 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,268 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:16,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1713451054, now seen corresponding path program 709 times [2021-07-13 19:51:16,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:16,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333106642] [2021-07-13 19:51:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333106642] [2021-07-13 19:51:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333106642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952511398] [2021-07-13 19:51:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:17,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952511398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:17,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988320682] [2021-07-13 19:51:17,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:17,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:17,004 INFO L87 Difference]: Start difference. First operand 839 states and 2774 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,337 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-07-13 19:51:17,515 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-13 19:51:17,707 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2021-07-13 19:51:17,892 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2021-07-13 19:51:18,038 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2021-07-13 19:51:18,204 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2021-07-13 19:51:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:18,225 INFO L93 Difference]: Finished difference Result 1384 states and 4326 transitions. [2021-07-13 19:51:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:18,227 INFO L225 Difference]: With dead ends: 1384 [2021-07-13 19:51:18,228 INFO L226 Difference]: Without dead ends: 1372 [2021-07-13 19:51:18,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1336.8ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-13 19:51:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 836. [2021-07-13 19:51:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.308982035928144) internal successors, (2763), 835 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2763 transitions. [2021-07-13 19:51:18,240 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2763 transitions. Word has length 22 [2021-07-13 19:51:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:18,241 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2763 transitions. [2021-07-13 19:51:18,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2763 transitions. [2021-07-13 19:51:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:18,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:18,242 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:18,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9225 [2021-07-13 19:51:18,442 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2075169976, now seen corresponding path program 710 times [2021-07-13 19:51:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:18,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18887417] [2021-07-13 19:51:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:18,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:18,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18887417] [2021-07-13 19:51:18,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18887417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61858256] [2021-07-13 19:51:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61858256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:19,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:19,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637166154] [2021-07-13 19:51:19,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:19,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:19,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:19,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:19,116 INFO L87 Difference]: Start difference. First operand 836 states and 2763 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,444 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 19:51:19,635 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-07-13 19:51:19,830 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-07-13 19:51:19,989 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-13 19:51:20,279 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-07-13 19:51:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:20,302 INFO L93 Difference]: Finished difference Result 1381 states and 4315 transitions. [2021-07-13 19:51:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:20,304 INFO L225 Difference]: With dead ends: 1381 [2021-07-13 19:51:20,304 INFO L226 Difference]: Without dead ends: 1363 [2021-07-13 19:51:20,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1232.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-07-13 19:51:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 833. [2021-07-13 19:51:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-13 19:51:20,317 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-13 19:51:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:20,318 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-13 19:51:20,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-13 19:51:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:20,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:20,319 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:20,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9237 [2021-07-13 19:51:20,519 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1179561522, now seen corresponding path program 711 times [2021-07-13 19:51:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:20,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931180574] [2021-07-13 19:51:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:20,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931180574] [2021-07-13 19:51:20,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931180574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121802917] [2021-07-13 19:51:20,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:20,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121802917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:21,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:21,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:21,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832912740] [2021-07-13 19:51:21,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:21,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:21,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:21,157 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,519 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 19:51:21,700 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-07-13 19:51:22,013 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2021-07-13 19:51:22,141 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2021-07-13 19:51:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:22,301 INFO L93 Difference]: Finished difference Result 1419 states and 4388 transitions. [2021-07-13 19:51:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:22,304 INFO L225 Difference]: With dead ends: 1419 [2021-07-13 19:51:22,304 INFO L226 Difference]: Without dead ends: 1395 [2021-07-13 19:51:22,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1126.2ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-13 19:51:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 830. [2021-07-13 19:51:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.3063932448733415) internal successors, (2741), 829 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2741 transitions. [2021-07-13 19:51:22,317 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2741 transitions. Word has length 22 [2021-07-13 19:51:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:22,317 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2741 transitions. [2021-07-13 19:51:22,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2741 transitions. [2021-07-13 19:51:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:22,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:22,318 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:22,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9254 [2021-07-13 19:51:22,518 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash 381531912, now seen corresponding path program 712 times [2021-07-13 19:51:22,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:22,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372942829] [2021-07-13 19:51:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:22,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372942829] [2021-07-13 19:51:22,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372942829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851621640] [2021-07-13 19:51:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:22,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:23,056 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-13 19:51:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851621640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:23,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324647413] [2021-07-13 19:51:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:23,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:23,371 INFO L87 Difference]: Start difference. First operand 830 states and 2741 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,714 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-07-13 19:51:23,927 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 19:51:24,124 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2021-07-13 19:51:24,310 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-07-13 19:51:24,490 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-07-13 19:51:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:24,669 INFO L93 Difference]: Finished difference Result 1341 states and 4208 transitions. [2021-07-13 19:51:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:24,672 INFO L225 Difference]: With dead ends: 1341 [2021-07-13 19:51:24,672 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 19:51:24,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1410.6ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 19:51:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 840. [2021-07-13 19:51:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.3122765196662693) internal successors, (2779), 839 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2779 transitions. [2021-07-13 19:51:24,687 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2779 transitions. Word has length 22 [2021-07-13 19:51:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:24,687 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2779 transitions. [2021-07-13 19:51:24,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2779 transitions. [2021-07-13 19:51:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:24,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:24,688 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:24,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9275,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,895 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1112375810, now seen corresponding path program 713 times [2021-07-13 19:51:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:24,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782977263] [2021-07-13 19:51:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:25,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782977263] [2021-07-13 19:51:25,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782977263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730437359] [2021-07-13 19:51:25,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:25,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:25,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:25,428 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-13 19:51:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:25,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730437359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:25,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844968812] [2021-07-13 19:51:25,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:25,726 INFO L87 Difference]: Start difference. First operand 840 states and 2779 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,066 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-13 19:51:26,281 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-13 19:51:26,484 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-07-13 19:51:26,665 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-07-13 19:51:26,838 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-07-13 19:51:27,077 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-13 19:51:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:27,109 INFO L93 Difference]: Finished difference Result 1347 states and 4215 transitions. [2021-07-13 19:51:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:27,111 INFO L225 Difference]: With dead ends: 1347 [2021-07-13 19:51:27,111 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 19:51:27,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1508.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 19:51:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 837. [2021-07-13 19:51:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.311004784688995) internal successors, (2768), 836 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2768 transitions. [2021-07-13 19:51:27,124 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2768 transitions. Word has length 22 [2021-07-13 19:51:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:27,124 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2768 transitions. [2021-07-13 19:51:27,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2768 transitions. [2021-07-13 19:51:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:27,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:27,126 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:27,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9295 [2021-07-13 19:51:27,326 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:27,326 INFO L82 PathProgramCache]: Analyzing trace with hash -574520232, now seen corresponding path program 714 times [2021-07-13 19:51:27,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:27,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630176650] [2021-07-13 19:51:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:27,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:27,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630176650] [2021-07-13 19:51:27,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630176650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:27,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216714234] [2021-07-13 19:51:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:27,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:28,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216714234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:28,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:28,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:28,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959174527] [2021-07-13 19:51:28,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:28,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:28,137 INFO L87 Difference]: Start difference. First operand 837 states and 2768 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,508 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 19:51:28,732 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-07-13 19:51:28,988 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-07-13 19:51:29,188 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-07-13 19:51:29,339 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2021-07-13 19:51:29,515 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-13 19:51:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:29,532 INFO L93 Difference]: Finished difference Result 1311 states and 4133 transitions. [2021-07-13 19:51:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:29,535 INFO L225 Difference]: With dead ends: 1311 [2021-07-13 19:51:29,535 INFO L226 Difference]: Without dead ends: 1299 [2021-07-13 19:51:29,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1470.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-13 19:51:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 834. [2021-07-13 19:51:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.3097238895558223) internal successors, (2757), 833 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2757 transitions. [2021-07-13 19:51:29,547 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2757 transitions. Word has length 22 [2021-07-13 19:51:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:29,547 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2757 transitions. [2021-07-13 19:51:29,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2757 transitions. [2021-07-13 19:51:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:29,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:29,548 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9316,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,749 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1080866498, now seen corresponding path program 715 times [2021-07-13 19:51:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:29,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167827149] [2021-07-13 19:51:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:29,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167827149] [2021-07-13 19:51:29,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167827149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714682077] [2021-07-13 19:51:29,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:30,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714682077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:30,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:30,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598330669] [2021-07-13 19:51:30,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:30,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:30,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:30,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:30,506 INFO L87 Difference]: Start difference. First operand 834 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,833 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-13 19:51:31,043 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-13 19:51:31,241 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2021-07-13 19:51:31,406 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 53 [2021-07-13 19:51:31,566 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 19:51:31,726 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-07-13 19:51:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:31,740 INFO L93 Difference]: Finished difference Result 1308 states and 4122 transitions. [2021-07-13 19:51:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:31,742 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 19:51:31,742 INFO L226 Difference]: Without dead ends: 1290 [2021-07-13 19:51:31,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1345.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-07-13 19:51:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 831. [2021-07-13 19:51:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.3084337349397592) internal successors, (2746), 830 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2746 transitions. [2021-07-13 19:51:31,754 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2746 transitions. Word has length 22 [2021-07-13 19:51:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:31,754 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2746 transitions. [2021-07-13 19:51:31,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2746 transitions. [2021-07-13 19:51:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:31,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:31,755 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:31,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9341 [2021-07-13 19:51:31,956 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash 922847102, now seen corresponding path program 716 times [2021-07-13 19:51:31,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:31,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854515033] [2021-07-13 19:51:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:32,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854515033] [2021-07-13 19:51:32,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854515033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140020788] [2021-07-13 19:51:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:32,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:32,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:32,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140020788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:32,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:32,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297293517] [2021-07-13 19:51:32,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:32,784 INFO L87 Difference]: Start difference. First operand 831 states and 2746 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,121 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-13 19:51:33,331 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-13 19:51:33,561 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-07-13 19:51:33,749 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-07-13 19:51:33,943 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 19:51:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:34,116 INFO L93 Difference]: Finished difference Result 1341 states and 4205 transitions. [2021-07-13 19:51:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:34,119 INFO L225 Difference]: With dead ends: 1341 [2021-07-13 19:51:34,119 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 19:51:34,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1437.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 19:51:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 838. [2021-07-13 19:51:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.3130227001194745) internal successors, (2773), 837 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2773 transitions. [2021-07-13 19:51:34,132 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2773 transitions. Word has length 22 [2021-07-13 19:51:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:34,132 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2773 transitions. [2021-07-13 19:51:34,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2773 transitions. [2021-07-13 19:51:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:34,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:34,133 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:34,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9361,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,334 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash -571060620, now seen corresponding path program 717 times [2021-07-13 19:51:34,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:34,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058394369] [2021-07-13 19:51:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:34,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:34,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058394369] [2021-07-13 19:51:34,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058394369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7377325] [2021-07-13 19:51:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:51:34,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7377325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:35,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:35,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:35,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053519079] [2021-07-13 19:51:35,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:35,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:35,185 INFO L87 Difference]: Start difference. First operand 838 states and 2773 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,518 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-07-13 19:51:35,738 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-07-13 19:51:35,961 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-13 19:51:36,150 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-07-13 19:51:36,335 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-07-13 19:51:36,523 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-07-13 19:51:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:36,554 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-07-13 19:51:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:36,556 INFO L225 Difference]: With dead ends: 1347 [2021-07-13 19:51:36,556 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 19:51:36,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 19:51:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 835. [2021-07-13 19:51:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3117505995203835) internal successors, (2762), 834 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2762 transitions. [2021-07-13 19:51:36,569 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2762 transitions. Word has length 22 [2021-07-13 19:51:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:36,570 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2762 transitions. [2021-07-13 19:51:36,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2762 transitions. [2021-07-13 19:51:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:36,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:36,571 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:36,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-07-13 19:51:36,771 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash -33205042, now seen corresponding path program 718 times [2021-07-13 19:51:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:36,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147408225] [2021-07-13 19:51:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:36,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:36,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147408225] [2021-07-13 19:51:36,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147408225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:36,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398040620] [2021-07-13 19:51:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:37,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:37,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:37,341 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-13 19:51:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398040620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680355300] [2021-07-13 19:51:37,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:37,704 INFO L87 Difference]: Start difference. First operand 835 states and 2762 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,131 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-13 19:51:38,348 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-07-13 19:51:38,571 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-07-13 19:51:38,777 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2021-07-13 19:51:38,942 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2021-07-13 19:51:39,119 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-07-13 19:51:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:39,133 INFO L93 Difference]: Finished difference Result 1311 states and 4130 transitions. [2021-07-13 19:51:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:39,136 INFO L225 Difference]: With dead ends: 1311 [2021-07-13 19:51:39,136 INFO L226 Difference]: Without dead ends: 1299 [2021-07-13 19:51:39,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1655.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-13 19:51:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 832. [2021-07-13 19:51:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.3104693140794224) internal successors, (2751), 831 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-07-13 19:51:39,151 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-07-13 19:51:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:39,151 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-07-13 19:51:39,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-07-13 19:51:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:39,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:39,152 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:39,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9391,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:39,353 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1553543096, now seen corresponding path program 719 times [2021-07-13 19:51:39,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:39,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575489841] [2021-07-13 19:51:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:39,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:39,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575489841] [2021-07-13 19:51:39,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575489841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:39,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245838148] [2021-07-13 19:51:39,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:39,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:39,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:40,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:40,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,104 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:51:40,104 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:40,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:40,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:51:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:40,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245838148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:40,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718006559] [2021-07-13 19:51:40,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:40,186 INFO L87 Difference]: Start difference. First operand 832 states and 2751 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,541 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-07-13 19:51:40,763 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-07-13 19:51:40,987 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-07-13 19:51:41,201 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-07-13 19:51:41,389 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-07-13 19:51:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:41,599 INFO L93 Difference]: Finished difference Result 1416 states and 4390 transitions. [2021-07-13 19:51:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:41,602 INFO L225 Difference]: With dead ends: 1416 [2021-07-13 19:51:41,602 INFO L226 Difference]: Without dead ends: 1416 [2021-07-13 19:51:41,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1434.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-13 19:51:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 840. [2021-07-13 19:51:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.3218116805721096) internal successors, (2787), 839 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2787 transitions. [2021-07-13 19:51:41,616 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2787 transitions. Word has length 22 [2021-07-13 19:51:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:41,616 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2787 transitions. [2021-07-13 19:51:41,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2787 transitions. [2021-07-13 19:51:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:41,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:41,617 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:41,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9409,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:41,817 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1247516478, now seen corresponding path program 720 times [2021-07-13 19:51:41,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:41,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610709906] [2021-07-13 19:51:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:41,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610709906] [2021-07-13 19:51:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610709906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89910106] [2021-07-13 19:51:41,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:42,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:42,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:42,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,566 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-13 19:51:42,566 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:42,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:42,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:51:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:42,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89910106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:42,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766730308] [2021-07-13 19:51:42,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:42,642 INFO L87 Difference]: Start difference. First operand 840 states and 2787 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,967 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-07-13 19:51:43,170 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-07-13 19:51:43,389 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 19:51:43,594 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-13 19:51:43,783 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-07-13 19:51:43,982 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-13 19:51:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:44,025 INFO L93 Difference]: Finished difference Result 1422 states and 4391 transitions. [2021-07-13 19:51:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:44,028 INFO L225 Difference]: With dead ends: 1422 [2021-07-13 19:51:44,028 INFO L226 Difference]: Without dead ends: 1416 [2021-07-13 19:51:44,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1455.4ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-13 19:51:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 837. [2021-07-13 19:51:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3205741626794256) internal successors, (2776), 836 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2776 transitions. [2021-07-13 19:51:44,042 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2776 transitions. Word has length 22 [2021-07-13 19:51:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:44,042 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2776 transitions. [2021-07-13 19:51:44,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2776 transitions. [2021-07-13 19:51:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:44,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:44,043 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:44,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9426 [2021-07-13 19:51:44,244 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash -802142658, now seen corresponding path program 721 times [2021-07-13 19:51:44,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:44,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605964983] [2021-07-13 19:51:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:44,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605964983] [2021-07-13 19:51:44,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605964983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142779191] [2021-07-13 19:51:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:44,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:45,005 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-13 19:51:45,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-07-13 19:51:45,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:45,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-13 19:51:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:45,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142779191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:45,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:45,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936729926] [2021-07-13 19:51:45,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:45,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:45,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:45,088 INFO L87 Difference]: Start difference. First operand 837 states and 2776 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,380 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-07-13 19:51:45,592 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 19:51:45,800 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-07-13 19:51:45,997 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-13 19:51:46,413 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 55 [2021-07-13 19:51:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:46,590 INFO L93 Difference]: Finished difference Result 1411 states and 4375 transitions. [2021-07-13 19:51:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:46,593 INFO L225 Difference]: With dead ends: 1411 [2021-07-13 19:51:46,593 INFO L226 Difference]: Without dead ends: 1390 [2021-07-13 19:51:46,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1589.5ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:51:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-13 19:51:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 833. [2021-07-13 19:51:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-13 19:51:46,611 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-13 19:51:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:46,611 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-13 19:51:46,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-13 19:51:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:46,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:46,612 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:46,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9444 [2021-07-13 19:51:46,812 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash -781406130, now seen corresponding path program 722 times [2021-07-13 19:51:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:46,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810916765] [2021-07-13 19:51:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:46,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810916765] [2021-07-13 19:51:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810916765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719545365] [2021-07-13 19:51:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:47,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:47,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:47,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:47,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:47,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:47,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:47,543 INFO L628 ElimStorePlain]: treesize reduction 166, result has 14.0 percent of original size [2021-07-13 19:51:47,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_772 vanished before elimination [2021-07-13 19:51:47,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_773 vanished before elimination [2021-07-13 19:51:47,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-07-13 19:51:47,543 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:47,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:47,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:220, output treesize:27 [2021-07-13 19:51:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719545365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:47,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:47,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133594953] [2021-07-13 19:51:47,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:47,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:47,623 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,983 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 19:51:48,208 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-07-13 19:51:48,463 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-07-13 19:51:48,677 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-07-13 19:51:48,886 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-07-13 19:51:49,090 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-07-13 19:51:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,209 INFO L93 Difference]: Finished difference Result 1367 states and 4273 transitions. [2021-07-13 19:51:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:51:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,211 INFO L225 Difference]: With dead ends: 1367 [2021-07-13 19:51:49,211 INFO L226 Difference]: Without dead ends: 1361 [2021-07-13 19:51:49,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1548.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:51:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-07-13 19:51:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 833. [2021-07-13 19:51:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-13 19:51:49,224 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-13 19:51:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,224 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-13 19:51:49,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-13 19:51:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:49,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,225 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9460,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,426 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1494703550, now seen corresponding path program 723 times [2021-07-13 19:51:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968806483] [2021-07-13 19:51:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968806483] [2021-07-13 19:51:49,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968806483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406122693] [2021-07-13 19:51:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:51:49,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:50,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406122693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:50,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:50,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:50,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355470237] [2021-07-13 19:51:50,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:50,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:50,273 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,637 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-07-13 19:51:50,854 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 19:51:51,086 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-07-13 19:51:51,369 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-07-13 19:51:51,521 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2021-07-13 19:51:51,697 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-07-13 19:51:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:51,715 INFO L93 Difference]: Finished difference Result 1305 states and 4119 transitions. [2021-07-13 19:51:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:51,718 INFO L225 Difference]: With dead ends: 1305 [2021-07-13 19:51:51,718 INFO L226 Difference]: Without dead ends: 1293 [2021-07-13 19:51:51,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1555.8ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-07-13 19:51:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 835. [2021-07-13 19:51:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-13 19:51:51,730 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-13 19:51:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:51,731 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-13 19:51:51,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-13 19:51:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:51,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:51,732 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:51,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9479 [2021-07-13 19:51:51,932 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2048863308, now seen corresponding path program 724 times [2021-07-13 19:51:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168847446] [2021-07-13 19:51:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:52,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168847446] [2021-07-13 19:51:52,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168847446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743404147] [2021-07-13 19:51:52,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:52,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:52,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:52,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:51:52,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:52,765 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-13 19:51:52,765 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:52,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:52,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-13 19:51:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743404147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:52,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:52,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106152752] [2021-07-13 19:51:52,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:52,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:52,814 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,166 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 19:51:53,388 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-07-13 19:51:53,620 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-07-13 19:51:53,839 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-07-13 19:51:54,032 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-13 19:51:54,223 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-13 19:51:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:54,338 INFO L93 Difference]: Finished difference Result 1307 states and 4126 transitions. [2021-07-13 19:51:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:51:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:54,340 INFO L225 Difference]: With dead ends: 1307 [2021-07-13 19:51:54,340 INFO L226 Difference]: Without dead ends: 1301 [2021-07-13 19:51:54,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:51:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-13 19:51:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 833. [2021-07-13 19:51:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-13 19:51:54,353 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-13 19:51:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:54,353 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-13 19:51:54,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-13 19:51:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:54,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:54,354 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:54,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9496,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,554 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash -960340402, now seen corresponding path program 725 times [2021-07-13 19:51:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:54,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338904439] [2021-07-13 19:51:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:54,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338904439] [2021-07-13 19:51:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338904439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335490375] [2021-07-13 19:51:54,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:54,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:54,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:54,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:55,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335490375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:55,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:55,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879635156] [2021-07-13 19:51:55,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:55,278 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:55,627 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-07-13 19:51:55,842 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-07-13 19:51:56,123 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-07-13 19:51:56,283 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-07-13 19:51:56,450 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-07-13 19:51:56,615 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 19:51:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:56,630 INFO L93 Difference]: Finished difference Result 1302 states and 4111 transitions. [2021-07-13 19:51:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:56,633 INFO L225 Difference]: With dead ends: 1302 [2021-07-13 19:51:56,633 INFO L226 Difference]: Without dead ends: 1284 [2021-07-13 19:51:56,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1413.0ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-07-13 19:51:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 835. [2021-07-13 19:51:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-13 19:51:56,645 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-13 19:51:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:56,645 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-13 19:51:56,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-13 19:51:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:56,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:56,646 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:56,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9528,750 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:56,846 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash 858236696, now seen corresponding path program 726 times [2021-07-13 19:51:56,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:56,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838644456] [2021-07-13 19:51:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:56,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838644456] [2021-07-13 19:51:56,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838644456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146713002] [2021-07-13 19:51:56,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:57,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:51:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146713002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:57,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:57,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755182321] [2021-07-13 19:51:57,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:57,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:57,586 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,944 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-13 19:51:58,168 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-07-13 19:51:58,390 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-07-13 19:51:58,582 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2021-07-13 19:51:58,725 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2021-07-13 19:51:58,899 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-07-13 19:51:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:58,914 INFO L93 Difference]: Finished difference Result 1298 states and 4103 transitions. [2021-07-13 19:51:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:51:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:58,916 INFO L225 Difference]: With dead ends: 1298 [2021-07-13 19:51:58,916 INFO L226 Difference]: Without dead ends: 1286 [2021-07-13 19:51:58,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1382.6ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-07-13 19:51:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 837. [2021-07-13 19:51:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3086124401913874) internal successors, (2766), 836 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-07-13 19:51:58,928 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-07-13 19:51:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:58,929 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-07-13 19:51:58,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-07-13 19:51:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:58,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:58,930 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:59,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 751 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9546 [2021-07-13 19:51:59,130 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637134, now seen corresponding path program 727 times [2021-07-13 19:51:59,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:59,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756720480] [2021-07-13 19:51:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756720480] [2021-07-13 19:51:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756720480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787422431] [2021-07-13 19:51:59,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:51:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:59,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:59,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,904 INFO L628 ElimStorePlain]: treesize reduction 79, result has 13.2 percent of original size [2021-07-13 19:51:59,904 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-07-13 19:51:59,904 INFO L518 ElimStorePlain]: Eliminatee v_prenex_809 vanished before elimination [2021-07-13 19:51:59,904 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:51:59,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:59,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:112, output treesize:12 [2021-07-13 19:51:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787422431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:59,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:51:59,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774306359] [2021-07-13 19:51:59,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:59,960 INFO L87 Difference]: Start difference. First operand 837 states and 2766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,298 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 19:52:00,509 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 19:52:00,788 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-07-13 19:52:01,045 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-07-13 19:52:01,229 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-13 19:52:01,417 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-13 19:52:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:01,532 INFO L93 Difference]: Finished difference Result 1300 states and 4110 transitions. [2021-07-13 19:52:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:01,535 INFO L225 Difference]: With dead ends: 1300 [2021-07-13 19:52:01,535 INFO L226 Difference]: Without dead ends: 1294 [2021-07-13 19:52:01,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1649.0ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:52:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-07-13 19:52:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 833. [2021-07-13 19:52:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-13 19:52:01,547 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-13 19:52:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:01,547 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-13 19:52:01,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-13 19:52:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:01,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:01,548 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9564 [2021-07-13 19:52:01,749 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1738219842, now seen corresponding path program 728 times [2021-07-13 19:52:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284162784] [2021-07-13 19:52:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:01,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:01,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284162784] [2021-07-13 19:52:01,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284162784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312541057] [2021-07-13 19:52:01,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:02,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:02,253 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-13 19:52:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:02,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312541057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:02,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:02,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:52:02,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728055484] [2021-07-13 19:52:02,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:02,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:02,461 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,784 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 19:52:03,043 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 19:52:03,345 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2021-07-13 19:52:03,489 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-07-13 19:52:03,640 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-07-13 19:52:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:03,667 INFO L93 Difference]: Finished difference Result 1332 states and 4167 transitions. [2021-07-13 19:52:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:03,670 INFO L225 Difference]: With dead ends: 1332 [2021-07-13 19:52:03,670 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 19:52:03,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1323.3ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 19:52:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 835. [2021-07-13 19:52:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-13 19:52:03,683 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-13 19:52:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:03,683 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-13 19:52:03,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-13 19:52:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:03,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:03,684 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:03,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9585,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:03,885 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 515277176, now seen corresponding path program 729 times [2021-07-13 19:52:03,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:03,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359953827] [2021-07-13 19:52:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:04,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:04,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359953827] [2021-07-13 19:52:04,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359953827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:04,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609792150] [2021-07-13 19:52:04,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:04,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:04,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:04,407 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-13 19:52:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:04,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609792150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:04,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:04,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:52:04,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335876395] [2021-07-13 19:52:04,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:04,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:04,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:04,661 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,018 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-13 19:52:05,224 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2021-07-13 19:52:05,429 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-07-13 19:52:05,627 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-07-13 19:52:05,773 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-07-13 19:52:05,940 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-07-13 19:52:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:05,962 INFO L93 Difference]: Finished difference Result 1285 states and 4068 transitions. [2021-07-13 19:52:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:05,964 INFO L225 Difference]: With dead ends: 1285 [2021-07-13 19:52:05,964 INFO L226 Difference]: Without dead ends: 1267 [2021-07-13 19:52:05,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1403.9ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-13 19:52:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 837. [2021-07-13 19:52:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3086124401913874) internal successors, (2766), 836 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-07-13 19:52:05,976 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-07-13 19:52:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:05,976 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-07-13 19:52:05,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-07-13 19:52:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:05,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:05,978 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:06,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9605,754 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:06,178 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1961113022, now seen corresponding path program 730 times [2021-07-13 19:52:06,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:06,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11653343] [2021-07-13 19:52:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:06,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11653343] [2021-07-13 19:52:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11653343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314818628] [2021-07-13 19:52:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:06,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:06,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314818628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:06,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:52:06,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516790944] [2021-07-13 19:52:06,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:06,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:06,921 INFO L87 Difference]: Start difference. First operand 837 states and 2766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:07,303 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-13 19:52:07,577 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-13 19:52:07,792 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-13 19:52:07,989 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-07-13 19:52:08,163 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-13 19:52:08,390 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-07-13 19:52:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:08,411 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-07-13 19:52:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:08,413 INFO L225 Difference]: With dead ends: 1279 [2021-07-13 19:52:08,413 INFO L226 Difference]: Without dead ends: 1267 [2021-07-13 19:52:08,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1500.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-13 19:52:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 839. [2021-07-13 19:52:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.3066825775656326) internal successors, (2771), 838 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2771 transitions. [2021-07-13 19:52:08,425 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2771 transitions. Word has length 22 [2021-07-13 19:52:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2771 transitions. [2021-07-13 19:52:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2771 transitions. [2021-07-13 19:52:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:08,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:08,427 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:08,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9623,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:08,627 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1209712584, now seen corresponding path program 731 times [2021-07-13 19:52:08,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:08,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545386571] [2021-07-13 19:52:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:08,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545386571] [2021-07-13 19:52:08,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545386571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972607447] [2021-07-13 19:52:08,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:08,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:09,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:09,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:52:09,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:09,338 INFO L628 ElimStorePlain]: treesize reduction 33, result has 26.7 percent of original size [2021-07-13 19:52:09,339 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:52:09,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:09,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:12 [2021-07-13 19:52:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:09,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972607447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:09,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:09,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:52:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44257851] [2021-07-13 19:52:09,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:09,385 INFO L87 Difference]: Start difference. First operand 839 states and 2771 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,721 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-13 19:52:09,930 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-07-13 19:52:10,131 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-07-13 19:52:10,328 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-07-13 19:52:10,507 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-07-13 19:52:10,690 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-07-13 19:52:10,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:10,805 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-07-13 19:52:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:10,807 INFO L225 Difference]: With dead ends: 1279 [2021-07-13 19:52:10,807 INFO L226 Difference]: Without dead ends: 1273 [2021-07-13 19:52:10,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1469.2ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:52:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-07-13 19:52:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 835. [2021-07-13 19:52:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-13 19:52:10,820 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-13 19:52:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:10,820 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-13 19:52:10,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-13 19:52:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:10,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:10,821 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:11,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9646,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,021 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash 873218397, now seen corresponding path program 23 times [2021-07-13 19:52:11,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:11,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398249157] [2021-07-13 19:52:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:11,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398249157] [2021-07-13 19:52:11,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398249157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520613464] [2021-07-13 19:52:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:52:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520613464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:11,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:52:11,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339801836] [2021-07-13 19:52:11,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:11,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:11,333 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:11,794 INFO L93 Difference]: Finished difference Result 1130 states and 3525 transitions. [2021-07-13 19:52:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:11,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:11,796 INFO L225 Difference]: With dead ends: 1130 [2021-07-13 19:52:11,796 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 19:52:11,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 19:52:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 863. [2021-07-13 19:52:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.2958236658932716) internal successors, (2841), 862 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2841 transitions. [2021-07-13 19:52:11,808 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2841 transitions. Word has length 22 [2021-07-13 19:52:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:11,808 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2841 transitions. [2021-07-13 19:52:11,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2841 transitions. [2021-07-13 19:52:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:11,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:11,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:12,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9668,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:12,010 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1581576615, now seen corresponding path program 24 times [2021-07-13 19:52:12,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:12,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332487462] [2021-07-13 19:52:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:12,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332487462] [2021-07-13 19:52:12,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332487462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30340450] [2021-07-13 19:52:12,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:12,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:52:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:12,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30340450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:12,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:12,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:52:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621215012] [2021-07-13 19:52:12,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:12,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:12,318 INFO L87 Difference]: Start difference. First operand 863 states and 2841 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:12,835 INFO L93 Difference]: Finished difference Result 1129 states and 3521 transitions. [2021-07-13 19:52:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:12,837 INFO L225 Difference]: With dead ends: 1129 [2021-07-13 19:52:12,837 INFO L226 Difference]: Without dead ends: 1117 [2021-07-13 19:52:12,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-13 19:52:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 860. [2021-07-13 19:52:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.2945285215366704) internal successors, (2830), 859 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2830 transitions. [2021-07-13 19:52:12,856 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2830 transitions. Word has length 22 [2021-07-13 19:52:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:12,856 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2830 transitions. [2021-07-13 19:52:12,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2830 transitions. [2021-07-13 19:52:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:12,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:12,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:13,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 758 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9676 [2021-07-13 19:52:13,058 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash -525207505, now seen corresponding path program 25 times [2021-07-13 19:52:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:13,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354040406] [2021-07-13 19:52:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:13,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354040406] [2021-07-13 19:52:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354040406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111095794] [2021-07-13 19:52:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:52:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111095794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:13,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:52:13,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229264460] [2021-07-13 19:52:13,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:13,362 INFO L87 Difference]: Start difference. First operand 860 states and 2830 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:13,743 INFO L93 Difference]: Finished difference Result 1106 states and 3473 transitions. [2021-07-13 19:52:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:13,745 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 19:52:13,746 INFO L226 Difference]: Without dead ends: 1085 [2021-07-13 19:52:13,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-07-13 19:52:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 857. [2021-07-13 19:52:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.2932242990654204) internal successors, (2819), 856 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2819 transitions. [2021-07-13 19:52:13,758 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2819 transitions. Word has length 22 [2021-07-13 19:52:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:13,758 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2819 transitions. [2021-07-13 19:52:13,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2819 transitions. [2021-07-13 19:52:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:13,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:13,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:13,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9682 [2021-07-13 19:52:13,959 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1853904925, now seen corresponding path program 26 times [2021-07-13 19:52:13,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637984998] [2021-07-13 19:52:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:14,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637984998] [2021-07-13 19:52:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637984998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843185624] [2021-07-13 19:52:14,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:14,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:14,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:52:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:14,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843185624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:14,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:14,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:52:14,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377735340] [2021-07-13 19:52:14,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:14,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:14,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:14,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:14,267 INFO L87 Difference]: Start difference. First operand 857 states and 2819 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:14,522 INFO L93 Difference]: Finished difference Result 1081 states and 3404 transitions. [2021-07-13 19:52:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:52:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:14,524 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 19:52:14,524 INFO L226 Difference]: Without dead ends: 1041 [2021-07-13 19:52:14,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-13 19:52:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 825. [2021-07-13 19:52:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.3276699029126213) internal successors, (2742), 824 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2742 transitions. [2021-07-13 19:52:14,536 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2742 transitions. Word has length 22 [2021-07-13 19:52:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:14,536 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2742 transitions. [2021-07-13 19:52:14,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2742 transitions. [2021-07-13 19:52:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:14,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:14,537 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:14,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9686 [2021-07-13 19:52:14,738 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1305500157, now seen corresponding path program 732 times [2021-07-13 19:52:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:14,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754137092] [2021-07-13 19:52:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:14,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:14,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754137092] [2021-07-13 19:52:14,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754137092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:14,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138179955] [2021-07-13 19:52:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:14,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:14,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:14,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:52:15,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:15,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:15,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:52:15,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,108 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-07-13 19:52:15,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:15,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-07-13 19:52:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138179955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:15,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 19:52:15,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314537144] [2021-07-13 19:52:15,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:15,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:15,154 INFO L87 Difference]: Start difference. First operand 825 states and 2742 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:15,442 INFO L93 Difference]: Finished difference Result 1202 states and 3846 transitions. [2021-07-13 19:52:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:15,444 INFO L225 Difference]: With dead ends: 1202 [2021-07-13 19:52:15,444 INFO L226 Difference]: Without dead ends: 1132 [2021-07-13 19:52:15,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-07-13 19:52:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 850. [2021-07-13 19:52:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.340400471142521) internal successors, (2836), 849 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-07-13 19:52:15,455 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-07-13 19:52:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:15,455 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-07-13 19:52:15,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-07-13 19:52:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:15,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:15,457 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:15,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9690,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:15,657 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:15,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1958577410, now seen corresponding path program 733 times [2021-07-13 19:52:15,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:15,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321082897] [2021-07-13 19:52:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321082897] [2021-07-13 19:52:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321082897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811331907] [2021-07-13 19:52:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:16,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:16,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:52:16,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:16,108 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:52:16,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:16,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:16,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:16,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:16,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:52:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:16,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811331907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:16,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:16,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981533347] [2021-07-13 19:52:16,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:16,167 INFO L87 Difference]: Start difference. First operand 850 states and 2836 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:16,639 INFO L93 Difference]: Finished difference Result 1158 states and 3675 transitions. [2021-07-13 19:52:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:16,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:16,642 INFO L225 Difference]: With dead ends: 1158 [2021-07-13 19:52:16,642 INFO L226 Difference]: Without dead ends: 1158 [2021-07-13 19:52:16,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-07-13 19:52:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 865. [2021-07-13 19:52:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.3275462962962963) internal successors, (2875), 864 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2875 transitions. [2021-07-13 19:52:16,654 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2875 transitions. Word has length 22 [2021-07-13 19:52:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:16,654 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2875 transitions. [2021-07-13 19:52:16,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2875 transitions. [2021-07-13 19:52:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:16,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:16,655 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:16,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9707,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:16,855 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -799933880, now seen corresponding path program 734 times [2021-07-13 19:52:16,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:16,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873380788] [2021-07-13 19:52:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:16,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873380788] [2021-07-13 19:52:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873380788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046671155] [2021-07-13 19:52:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:17,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:17,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:17,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:17,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,304 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:52:17,304 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:52:17,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:17,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:52:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046671155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:17,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:17,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206946800] [2021-07-13 19:52:17,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:17,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:17,369 INFO L87 Difference]: Start difference. First operand 865 states and 2875 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:17,864 INFO L93 Difference]: Finished difference Result 1210 states and 3796 transitions. [2021-07-13 19:52:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:17,866 INFO L225 Difference]: With dead ends: 1210 [2021-07-13 19:52:17,866 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:52:17,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:52:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 868. [2021-07-13 19:52:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.328719723183391) internal successors, (2886), 867 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2886 transitions. [2021-07-13 19:52:17,879 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2886 transitions. Word has length 22 [2021-07-13 19:52:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2886 transitions. [2021-07-13 19:52:17,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2886 transitions. [2021-07-13 19:52:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:17,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:17,880 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:18,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9725,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:18,081 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:18,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2001125694, now seen corresponding path program 735 times [2021-07-13 19:52:18,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:18,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401877242] [2021-07-13 19:52:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:18,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:18,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401877242] [2021-07-13 19:52:18,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401877242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918295084] [2021-07-13 19:52:18,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:18,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:18,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:18,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:18,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:18,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:18,545 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:52:18,545 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:52:18,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:18,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:52:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:18,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918295084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:18,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:18,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380895508] [2021-07-13 19:52:18,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:18,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:18,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:18,600 INFO L87 Difference]: Start difference. First operand 868 states and 2886 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,099 INFO L93 Difference]: Finished difference Result 1167 states and 3693 transitions. [2021-07-13 19:52:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,101 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:52:19,101 INFO L226 Difference]: Without dead ends: 1161 [2021-07-13 19:52:19,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-13 19:52:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 860. [2021-07-13 19:52:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.331781140861467) internal successors, (2862), 859 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2862 transitions. [2021-07-13 19:52:19,113 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2862 transitions. Word has length 22 [2021-07-13 19:52:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,113 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2862 transitions. [2021-07-13 19:52:19,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2862 transitions. [2021-07-13 19:52:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:19,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,114 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9742 [2021-07-13 19:52:19,315 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash 294157708, now seen corresponding path program 736 times [2021-07-13 19:52:19,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313845297] [2021-07-13 19:52:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313845297] [2021-07-13 19:52:19,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313845297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57237335] [2021-07-13 19:52:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:19,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57237335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:19,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:19,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287180567] [2021-07-13 19:52:19,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:19,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:19,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:19,863 INFO L87 Difference]: Start difference. First operand 860 states and 2862 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,427 INFO L93 Difference]: Finished difference Result 1110 states and 3528 transitions. [2021-07-13 19:52:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,430 INFO L225 Difference]: With dead ends: 1110 [2021-07-13 19:52:20,430 INFO L226 Difference]: Without dead ends: 1110 [2021-07-13 19:52:20,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-13 19:52:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 866. [2021-07-13 19:52:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.3341040462427745) internal successors, (2884), 865 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2884 transitions. [2021-07-13 19:52:20,442 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2884 transitions. Word has length 22 [2021-07-13 19:52:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,442 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2884 transitions. [2021-07-13 19:52:20,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2884 transitions. [2021-07-13 19:52:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:20,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,443 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9759,765 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,643 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1199750014, now seen corresponding path program 737 times [2021-07-13 19:52:20,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369200337] [2021-07-13 19:52:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369200337] [2021-07-13 19:52:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369200337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997961744] [2021-07-13 19:52:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997961744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:21,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:21,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111689166] [2021-07-13 19:52:21,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:21,250 INFO L87 Difference]: Start difference. First operand 866 states and 2884 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,844 INFO L93 Difference]: Finished difference Result 1116 states and 3535 transitions. [2021-07-13 19:52:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,846 INFO L225 Difference]: With dead ends: 1116 [2021-07-13 19:52:21,847 INFO L226 Difference]: Without dead ends: 1110 [2021-07-13 19:52:21,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-13 19:52:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 863. [2021-07-13 19:52:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.3329466357308584) internal successors, (2873), 862 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2873 transitions. [2021-07-13 19:52:21,859 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2873 transitions. Word has length 22 [2021-07-13 19:52:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,859 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2873 transitions. [2021-07-13 19:52:21,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2873 transitions. [2021-07-13 19:52:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:21,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,860 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:22,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9774 [2021-07-13 19:52:22,061 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -661894436, now seen corresponding path program 738 times [2021-07-13 19:52:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:22,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067404545] [2021-07-13 19:52:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067404545] [2021-07-13 19:52:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067404545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761211906] [2021-07-13 19:52:22,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:22,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:22,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761211906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:22,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713074257] [2021-07-13 19:52:22,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:22,684 INFO L87 Difference]: Start difference. First operand 863 states and 2873 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:23,331 INFO L93 Difference]: Finished difference Result 1074 states and 3440 transitions. [2021-07-13 19:52:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:23,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:23,333 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 19:52:23,333 INFO L226 Difference]: Without dead ends: 1062 [2021-07-13 19:52:23,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-07-13 19:52:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 855. [2021-07-13 19:52:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.3360655737704916) internal successors, (2849), 854 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2849 transitions. [2021-07-13 19:52:23,344 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2849 transitions. Word has length 22 [2021-07-13 19:52:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:23,344 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2849 transitions. [2021-07-13 19:52:23,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2849 transitions. [2021-07-13 19:52:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:23,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:23,345 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:23,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 767 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9788 [2021-07-13 19:52:23,545 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -148741432, now seen corresponding path program 739 times [2021-07-13 19:52:23,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:23,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700980667] [2021-07-13 19:52:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:23,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:23,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700980667] [2021-07-13 19:52:23,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700980667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652809956] [2021-07-13 19:52:23,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652809956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:24,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:24,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023178197] [2021-07-13 19:52:24,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:24,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:24,138 INFO L87 Difference]: Start difference. First operand 855 states and 2849 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:24,731 INFO L93 Difference]: Finished difference Result 1099 states and 3496 transitions. [2021-07-13 19:52:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:24,734 INFO L225 Difference]: With dead ends: 1099 [2021-07-13 19:52:24,734 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:52:24,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:52:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 864. [2021-07-13 19:52:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.339513325608343) internal successors, (2882), 863 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2882 transitions. [2021-07-13 19:52:24,752 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2882 transitions. Word has length 22 [2021-07-13 19:52:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:24,752 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2882 transitions. [2021-07-13 19:52:24,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2882 transitions. [2021-07-13 19:52:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:24,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:24,753 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:24,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9805,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:24,953 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1642649154, now seen corresponding path program 740 times [2021-07-13 19:52:24,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:24,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363015376] [2021-07-13 19:52:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:25,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:25,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363015376] [2021-07-13 19:52:25,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363015376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488258297] [2021-07-13 19:52:25,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:25,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488258297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:25,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:25,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646005064] [2021-07-13 19:52:25,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:25,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:25,538 INFO L87 Difference]: Start difference. First operand 864 states and 2882 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:26,153 INFO L93 Difference]: Finished difference Result 1105 states and 3503 transitions. [2021-07-13 19:52:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:26,155 INFO L225 Difference]: With dead ends: 1105 [2021-07-13 19:52:26,155 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:52:26,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:52:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 861. [2021-07-13 19:52:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.338372093023256) internal successors, (2871), 860 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2871 transitions. [2021-07-13 19:52:26,167 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2871 transitions. Word has length 22 [2021-07-13 19:52:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:26,167 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2871 transitions. [2021-07-13 19:52:26,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2871 transitions. [2021-07-13 19:52:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:26,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:26,168 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:26,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 769 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9820 [2021-07-13 19:52:26,369 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1104793576, now seen corresponding path program 741 times [2021-07-13 19:52:26,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:26,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598564699] [2021-07-13 19:52:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598564699] [2021-07-13 19:52:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598564699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726883968] [2021-07-13 19:52:26,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:26,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:26,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726883968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:26,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:26,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41359721] [2021-07-13 19:52:26,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:26,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:26,939 INFO L87 Difference]: Start difference. First operand 861 states and 2871 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,460 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 19:52:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:27,676 INFO L93 Difference]: Finished difference Result 1069 states and 3421 transitions. [2021-07-13 19:52:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:27,678 INFO L225 Difference]: With dead ends: 1069 [2021-07-13 19:52:27,678 INFO L226 Difference]: Without dead ends: 1057 [2021-07-13 19:52:27,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-13 19:52:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 858. [2021-07-13 19:52:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.337222870478413) internal successors, (2860), 857 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2860 transitions. [2021-07-13 19:52:27,689 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2860 transitions. Word has length 22 [2021-07-13 19:52:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:27,689 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2860 transitions. [2021-07-13 19:52:27,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2860 transitions. [2021-07-13 19:52:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:27,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:27,690 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:27,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9837,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:27,891 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1611139842, now seen corresponding path program 742 times [2021-07-13 19:52:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:27,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961627677] [2021-07-13 19:52:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:28,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:28,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961627677] [2021-07-13 19:52:28,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961627677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050340827] [2021-07-13 19:52:28,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:28,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:28,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050340827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:28,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:28,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423618610] [2021-07-13 19:52:28,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:28,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:28,500 INFO L87 Difference]: Start difference. First operand 858 states and 2860 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,084 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-07-13 19:52:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:29,152 INFO L93 Difference]: Finished difference Result 1060 states and 3397 transitions. [2021-07-13 19:52:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:29,153 INFO L225 Difference]: With dead ends: 1060 [2021-07-13 19:52:29,154 INFO L226 Difference]: Without dead ends: 1042 [2021-07-13 19:52:29,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-13 19:52:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 850. [2021-07-13 19:52:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.340400471142521) internal successors, (2836), 849 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-07-13 19:52:29,164 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-07-13 19:52:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:29,164 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-07-13 19:52:29,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-07-13 19:52:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:29,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:29,166 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:29,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 771 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9855 [2021-07-13 19:52:29,366 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 711432611, now seen corresponding path program 743 times [2021-07-13 19:52:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:29,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428692596] [2021-07-13 19:52:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:29,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:29,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428692596] [2021-07-13 19:52:29,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428692596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130614461] [2021-07-13 19:52:29,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:29,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:29,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:29,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:29,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:29,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:52:29,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:29,750 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-07-13 19:52:29,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:29,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:15 [2021-07-13 19:52:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:29,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130614461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:29,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 19:52:29,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146232720] [2021-07-13 19:52:29,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:29,797 INFO L87 Difference]: Start difference. First operand 850 states and 2836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:30,193 INFO L93 Difference]: Finished difference Result 1304 states and 4164 transitions. [2021-07-13 19:52:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:30,195 INFO L225 Difference]: With dead ends: 1304 [2021-07-13 19:52:30,195 INFO L226 Difference]: Without dead ends: 1234 [2021-07-13 19:52:30,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-07-13 19:52:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 857. [2021-07-13 19:52:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.34696261682243) internal successors, (2865), 856 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-07-13 19:52:30,207 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-07-13 19:52:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:30,207 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-07-13 19:52:30,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-07-13 19:52:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:30,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:30,208 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:30,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,409 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1937291592, now seen corresponding path program 744 times [2021-07-13 19:52:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:30,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326650241] [2021-07-13 19:52:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:30,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326650241] [2021-07-13 19:52:30,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326650241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144256182] [2021-07-13 19:52:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:52:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:30,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:30,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:30,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:52:30,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:30,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:30,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:30,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:30,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:30,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-07-13 19:52:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144256182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:30,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917477639] [2021-07-13 19:52:30,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:30,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:30,986 INFO L87 Difference]: Start difference. First operand 857 states and 2865 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:31,543 INFO L93 Difference]: Finished difference Result 1191 states and 3776 transitions. [2021-07-13 19:52:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:31,545 INFO L225 Difference]: With dead ends: 1191 [2021-07-13 19:52:31,545 INFO L226 Difference]: Without dead ends: 1191 [2021-07-13 19:52:31,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-07-13 19:52:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 867. [2021-07-13 19:52:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.338337182448037) internal successors, (2891), 866 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2891 transitions. [2021-07-13 19:52:31,558 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2891 transitions. Word has length 22 [2021-07-13 19:52:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:31,558 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2891 transitions. [2021-07-13 19:52:31,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2891 transitions. [2021-07-13 19:52:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:31,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:31,559 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:31,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-07-13 19:52:31,759 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1199032174, now seen corresponding path program 745 times [2021-07-13 19:52:31,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:31,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031586627] [2021-07-13 19:52:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:31,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:31,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031586627] [2021-07-13 19:52:31,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031586627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:31,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222792221] [2021-07-13 19:52:31,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:32,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:32,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:32,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,250 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-13 19:52:32,250 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:52:32,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:32,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:52:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222792221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:32,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610601786] [2021-07-13 19:52:32,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:32,310 INFO L87 Difference]: Start difference. First operand 867 states and 2891 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:32,783 INFO L93 Difference]: Finished difference Result 1243 states and 3897 transitions. [2021-07-13 19:52:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:32,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:32,785 INFO L225 Difference]: With dead ends: 1243 [2021-07-13 19:52:32,785 INFO L226 Difference]: Without dead ends: 1243 [2021-07-13 19:52:32,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-07-13 19:52:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 870. [2021-07-13 19:52:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.3394706559263523) internal successors, (2902), 869 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2902 transitions. [2021-07-13 19:52:32,798 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2902 transitions. Word has length 22 [2021-07-13 19:52:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:32,798 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2902 transitions. [2021-07-13 19:52:32,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2902 transitions. [2021-07-13 19:52:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:32,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:32,800 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:33,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:33,000 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1602027400, now seen corresponding path program 746 times [2021-07-13 19:52:33,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:33,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495946907] [2021-07-13 19:52:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495946907] [2021-07-13 19:52:33,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495946907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486945054] [2021-07-13 19:52:33,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:33,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:33,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:33,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:33,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-07-13 19:52:33,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:33,512 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 19:52:33,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:33,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:33,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:33,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:33,521 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-13 19:52:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486945054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:33,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:33,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639728130] [2021-07-13 19:52:33,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:33,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:33,579 INFO L87 Difference]: Start difference. First operand 870 states and 2902 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:34,057 INFO L93 Difference]: Finished difference Result 1200 states and 3794 transitions. [2021-07-13 19:52:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:34,059 INFO L225 Difference]: With dead ends: 1200 [2021-07-13 19:52:34,060 INFO L226 Difference]: Without dead ends: 1194 [2021-07-13 19:52:34,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-13 19:52:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2021-07-13 19:52:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.342624854819977) internal successors, (2878), 861 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2878 transitions. [2021-07-13 19:52:34,072 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2878 transitions. Word has length 22 [2021-07-13 19:52:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:34,072 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2878 transitions. [2021-07-13 19:52:34,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2878 transitions. [2021-07-13 19:52:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:34,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:34,073 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:34,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 775 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-07-13 19:52:34,273 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash -104940586, now seen corresponding path program 747 times [2021-07-13 19:52:34,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:34,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576195120] [2021-07-13 19:52:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576195120] [2021-07-13 19:52:34,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576195120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162903283] [2021-07-13 19:52:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:34,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:52:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162903283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:34,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:34,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903456390] [2021-07-13 19:52:34,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:34,909 INFO L87 Difference]: Start difference. First operand 862 states and 2878 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,572 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 19:52:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:35,666 INFO L93 Difference]: Finished difference Result 1143 states and 3629 transitions. [2021-07-13 19:52:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:35,668 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:52:35,668 INFO L226 Difference]: Without dead ends: 1143 [2021-07-13 19:52:35,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-13 19:52:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 868. [2021-07-13 19:52:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.344867358708189) internal successors, (2900), 867 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2900 transitions. [2021-07-13 19:52:35,680 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2900 transitions. Word has length 22 [2021-07-13 19:52:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:35,680 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2900 transitions. [2021-07-13 19:52:35,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2900 transitions. [2021-07-13 19:52:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:35,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:35,681 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:35,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-07-13 19:52:35,882 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1598848308, now seen corresponding path program 748 times [2021-07-13 19:52:35,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:35,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946148006] [2021-07-13 19:52:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946148006] [2021-07-13 19:52:36,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946148006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061579007] [2021-07-13 19:52:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:36,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061579007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:36,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270100510] [2021-07-13 19:52:36,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:36,543 INFO L87 Difference]: Start difference. First operand 868 states and 2900 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,187 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 19:52:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:37,277 INFO L93 Difference]: Finished difference Result 1149 states and 3636 transitions. [2021-07-13 19:52:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:37,279 INFO L225 Difference]: With dead ends: 1149 [2021-07-13 19:52:37,279 INFO L226 Difference]: Without dead ends: 1143 [2021-07-13 19:52:37,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-13 19:52:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 865. [2021-07-13 19:52:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.34375) internal successors, (2889), 864 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2889 transitions. [2021-07-13 19:52:37,291 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2889 transitions. Word has length 22 [2021-07-13 19:52:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:37,291 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2889 transitions. [2021-07-13 19:52:37,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2889 transitions. [2021-07-13 19:52:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:37,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:37,292 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:37,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,777 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,493 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1060992730, now seen corresponding path program 749 times [2021-07-13 19:52:37,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:37,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690064545] [2021-07-13 19:52:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690064545] [2021-07-13 19:52:37,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690064545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487407391] [2021-07-13 19:52:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:37,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487407391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:38,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:38,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907136232] [2021-07-13 19:52:38,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:38,166 INFO L87 Difference]: Start difference. First operand 865 states and 2889 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,818 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-07-13 19:52:39,021 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-07-13 19:52:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:39,050 INFO L93 Difference]: Finished difference Result 1107 states and 3541 transitions. [2021-07-13 19:52:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:39,052 INFO L225 Difference]: With dead ends: 1107 [2021-07-13 19:52:39,052 INFO L226 Difference]: Without dead ends: 1095 [2021-07-13 19:52:39,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 943.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-07-13 19:52:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 857. [2021-07-13 19:52:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.34696261682243) internal successors, (2865), 856 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-07-13 19:52:39,063 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-07-13 19:52:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:39,063 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-07-13 19:52:39,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-07-13 19:52:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:39,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:39,064 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:39,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9975,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,264 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1469231619, now seen corresponding path program 750 times [2021-07-13 19:52:39,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:39,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862926621] [2021-07-13 19:52:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862926621] [2021-07-13 19:52:39,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862926621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038094183] [2021-07-13 19:52:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:39,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,660 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-07-13 19:52:39,660 INFO L518 ElimStorePlain]: Eliminatee v_prenex_874 vanished before elimination [2021-07-13 19:52:39,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:39,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:39,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,704 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.4 percent of original size [2021-07-13 19:52:39,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:39,705 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-07-13 19:52:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038094183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:39,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 19:52:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853754346] [2021-07-13 19:52:39,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:39,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:39,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:39,786 INFO L87 Difference]: Start difference. First operand 857 states and 2865 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:40,257 INFO L93 Difference]: Finished difference Result 1424 states and 4477 transitions. [2021-07-13 19:52:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:40,259 INFO L225 Difference]: With dead ends: 1424 [2021-07-13 19:52:40,259 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 19:52:40,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 19:52:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 864. [2021-07-13 19:52:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.3615295480880647) internal successors, (2901), 863 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2901 transitions. [2021-07-13 19:52:40,273 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2901 transitions. Word has length 22 [2021-07-13 19:52:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:40,273 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2901 transitions. [2021-07-13 19:52:40,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2901 transitions. [2021-07-13 19:52:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:40,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:40,274 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:40,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 779 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-07-13 19:52:40,475 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1816360514, now seen corresponding path program 751 times [2021-07-13 19:52:40,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:40,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71308226] [2021-07-13 19:52:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:40,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71308226] [2021-07-13 19:52:40,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71308226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261303324] [2021-07-13 19:52:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:40,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:40,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:40,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:40,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,987 INFO L628 ElimStorePlain]: treesize reduction 33, result has 70.3 percent of original size [2021-07-13 19:52:40,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:40,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:40,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:40,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:41,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:41,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:41,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:41,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:41,056 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-07-13 19:52:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261303324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:41,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:41,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424013313] [2021-07-13 19:52:41,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:41,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:41,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:41,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:41,143 INFO L87 Difference]: Start difference. First operand 864 states and 2901 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:41,667 INFO L93 Difference]: Finished difference Result 1384 states and 4338 transitions. [2021-07-13 19:52:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:41,669 INFO L225 Difference]: With dead ends: 1384 [2021-07-13 19:52:41,669 INFO L226 Difference]: Without dead ends: 1384 [2021-07-13 19:52:41,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-07-13 19:52:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 876. [2021-07-13 19:52:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.362285714285714) internal successors, (2942), 875 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2942 transitions. [2021-07-13 19:52:41,682 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2942 transitions. Word has length 22 [2021-07-13 19:52:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,683 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2942 transitions. [2021-07-13 19:52:41,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2942 transitions. [2021-07-13 19:52:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:41,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,684 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:41,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-07-13 19:52:41,884 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash -657716984, now seen corresponding path program 752 times [2021-07-13 19:52:41,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:41,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945457207] [2021-07-13 19:52:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945457207] [2021-07-13 19:52:42,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945457207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124828447] [2021-07-13 19:52:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:42,326 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_882, v_prenex_883, v_prenex_887], 1=[v_prenex_889, v_prenex_884, nondet_0]} [2021-07-13 19:52:42,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:42,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,465 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:52:42,466 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-07-13 19:52:42,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:42,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:42,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_889 vanished before elimination [2021-07-13 19:52:42,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:42,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:42,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:42,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:42,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,749 INFO L628 ElimStorePlain]: treesize reduction 15, result has 85.6 percent of original size [2021-07-13 19:52:42,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:52:42,751 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-13 19:52:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124828447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:42,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:42,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541965446] [2021-07-13 19:52:42,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:42,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:42,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:42,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:42,843 INFO L87 Difference]: Start difference. First operand 876 states and 2942 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:43,348 INFO L93 Difference]: Finished difference Result 1416 states and 4397 transitions. [2021-07-13 19:52:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:43,351 INFO L225 Difference]: With dead ends: 1416 [2021-07-13 19:52:43,351 INFO L226 Difference]: Without dead ends: 1416 [2021-07-13 19:52:43,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-13 19:52:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 882. [2021-07-13 19:52:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.3677639046538026) internal successors, (2967), 881 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2967 transitions. [2021-07-13 19:52:43,365 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2967 transitions. Word has length 22 [2021-07-13 19:52:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,365 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2967 transitions. [2021-07-13 19:52:43,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2967 transitions. [2021-07-13 19:52:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:43,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,366 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:43,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10029 [2021-07-13 19:52:43,567 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2143342590, now seen corresponding path program 753 times [2021-07-13 19:52:43,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:43,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981152623] [2021-07-13 19:52:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981152623] [2021-07-13 19:52:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981152623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261679592] [2021-07-13 19:52:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:52:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:44,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 19:52:44,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 19:52:44,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:44,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2021-07-13 19:52:44,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:44,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:44,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:52:44,233 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:207, output treesize:116 [2021-07-13 19:52:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261679592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:44,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:52:44,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087232052] [2021-07-13 19:52:44,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:52:44,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:52:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:44,468 INFO L87 Difference]: Start difference. First operand 882 states and 2967 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:44,938 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-13 19:52:45,371 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-07-13 19:52:45,492 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-13 19:52:45,637 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-07-13 19:52:45,780 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 19:52:45,909 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-13 19:52:46,087 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-07-13 19:52:46,337 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-13 19:52:46,510 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-07-13 19:52:46,803 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-07-13 19:52:46,960 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-07-13 19:52:47,111 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-07-13 19:52:47,297 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 19:52:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:47,352 INFO L93 Difference]: Finished difference Result 2391 states and 7250 transitions. [2021-07-13 19:52:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:52:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:47,357 INFO L225 Difference]: With dead ends: 2391 [2021-07-13 19:52:47,357 INFO L226 Difference]: Without dead ends: 2189 [2021-07-13 19:52:47,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2764.4ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-07-13 19:52:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1017. [2021-07-13 19:52:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.4783464566929134) internal successors, (3534), 1016 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3534 transitions. [2021-07-13 19:52:47,376 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3534 transitions. Word has length 22 [2021-07-13 19:52:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:47,376 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3534 transitions. [2021-07-13 19:52:47,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3534 transitions. [2021-07-13 19:52:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:47,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:47,378 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:47,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 782 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10047 [2021-07-13 19:52:47,578 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1405848029, now seen corresponding path program 754 times [2021-07-13 19:52:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770861803] [2021-07-13 19:52:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:47,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770861803] [2021-07-13 19:52:47,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770861803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97945923] [2021-07-13 19:52:47,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:47,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:47,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:47,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:47,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:47,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:47,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,005 INFO L628 ElimStorePlain]: treesize reduction 28, result has 61.1 percent of original size [2021-07-13 19:52:48,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:48,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:48,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:48,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:21 [2021-07-13 19:52:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97945923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:48,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 19:52:48,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269331611] [2021-07-13 19:52:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:48,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:48,108 INFO L87 Difference]: Start difference. First operand 1017 states and 3534 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:48,607 INFO L93 Difference]: Finished difference Result 1448 states and 4722 transitions. [2021-07-13 19:52:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:48,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:48,610 INFO L225 Difference]: With dead ends: 1448 [2021-07-13 19:52:48,610 INFO L226 Difference]: Without dead ends: 1364 [2021-07-13 19:52:48,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-07-13 19:52:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1017. [2021-07-13 19:52:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.4714566929133857) internal successors, (3527), 1016 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3527 transitions. [2021-07-13 19:52:48,624 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3527 transitions. Word has length 22 [2021-07-13 19:52:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:48,625 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3527 transitions. [2021-07-13 19:52:48,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3527 transitions. [2021-07-13 19:52:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:48,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:48,626 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:48,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10072 [2021-07-13 19:52:48,826 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2216584, now seen corresponding path program 755 times [2021-07-13 19:52:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:48,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893417615] [2021-07-13 19:52:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893417615] [2021-07-13 19:52:48,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893417615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717820668] [2021-07-13 19:52:48,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:49,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:49,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:49,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:49,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:49,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:49,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,390 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-07-13 19:52:49,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:49,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:49,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:49,411 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:52:49,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:49,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:52:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:49,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717820668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:49,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:49,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:49,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605506550] [2021-07-13 19:52:49,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:49,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:49,515 INFO L87 Difference]: Start difference. First operand 1017 states and 3527 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:50,076 INFO L93 Difference]: Finished difference Result 1483 states and 4798 transitions. [2021-07-13 19:52:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:50,079 INFO L225 Difference]: With dead ends: 1483 [2021-07-13 19:52:50,079 INFO L226 Difference]: Without dead ends: 1483 [2021-07-13 19:52:50,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-07-13 19:52:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1021. [2021-07-13 19:52:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.4686274509803923) internal successors, (3538), 1020 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3538 transitions. [2021-07-13 19:52:50,094 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3538 transitions. Word has length 22 [2021-07-13 19:52:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:50,094 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3538 transitions. [2021-07-13 19:52:50,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3538 transitions. [2021-07-13 19:52:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:50,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:50,095 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:50,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10097,784 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,296 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1635267976, now seen corresponding path program 756 times [2021-07-13 19:52:50,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:50,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256461646] [2021-07-13 19:52:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:50,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256461646] [2021-07-13 19:52:50,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256461646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719074941] [2021-07-13 19:52:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:50,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:50,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:50,810 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_899, v_prenex_900, v_prenex_906], 1=[v_prenex_901, v_prenex_902, nondet_0]} [2021-07-13 19:52:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:50,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:50,965 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:52:50,965 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-07-13 19:52:50,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:50,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:51,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:51,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:51,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:51,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-07-13 19:52:51,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:51,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:51,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:51,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:52:51,232 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-13 19:52:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:51,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719074941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:51,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:51,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:51,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134557001] [2021-07-13 19:52:51,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:51,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:51,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:51,352 INFO L87 Difference]: Start difference. First operand 1021 states and 3538 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:52,053 INFO L93 Difference]: Finished difference Result 1421 states and 4671 transitions. [2021-07-13 19:52:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:52,056 INFO L225 Difference]: With dead ends: 1421 [2021-07-13 19:52:52,056 INFO L226 Difference]: Without dead ends: 1421 [2021-07-13 19:52:52,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-07-13 19:52:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-07-13 19:52:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.470993117010816) internal successors, (3530), 1017 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3530 transitions. [2021-07-13 19:52:52,071 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3530 transitions. Word has length 22 [2021-07-13 19:52:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:52,071 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 3530 transitions. [2021-07-13 19:52:52,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3530 transitions. [2021-07-13 19:52:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:52,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:52,072 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:52,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 785 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10117 [2021-07-13 19:52:52,273 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 967081110, now seen corresponding path program 757 times [2021-07-13 19:52:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583328130] [2021-07-13 19:52:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:52,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583328130] [2021-07-13 19:52:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583328130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043087013] [2021-07-13 19:52:52,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:52,790 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_910, v_prenex_909, nondet_0], 1=[v_prenex_912, v_prenex_914, v_prenex_916]} [2021-07-13 19:52:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:52,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:52,952 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:52:52,952 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-07-13 19:52:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:52,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:53,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:53,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:53,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-07-13 19:52:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:53,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:53,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:52:53,213 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-13 19:52:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:53,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043087013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:53,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 19:52:53,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313451589] [2021-07-13 19:52:53,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:53,333 INFO L87 Difference]: Start difference. First operand 1018 states and 3530 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:54,007 INFO L93 Difference]: Finished difference Result 1515 states and 4901 transitions. [2021-07-13 19:52:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:54,010 INFO L225 Difference]: With dead ends: 1515 [2021-07-13 19:52:54,010 INFO L226 Difference]: Without dead ends: 1515 [2021-07-13 19:52:54,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-13 19:52:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1026. [2021-07-13 19:52:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.4790243902439024) internal successors, (3566), 1025 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3566 transitions. [2021-07-13 19:52:54,027 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3566 transitions. Word has length 22 [2021-07-13 19:52:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:54,027 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3566 transitions. [2021-07-13 19:52:54,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3566 transitions. [2021-07-13 19:52:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:54,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:54,028 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:54,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10135,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:54,229 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -526826612, now seen corresponding path program 758 times [2021-07-13 19:52:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026566297] [2021-07-13 19:52:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:54,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026566297] [2021-07-13 19:52:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026566297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352287172] [2021-07-13 19:52:54,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:54,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:54,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:54,738 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_919, nondet_0, v_prenex_920], 1=[v_prenex_921, v_prenex_924, v_prenex_926]} [2021-07-13 19:52:54,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:54,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:54,892 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-07-13 19:52:54,892 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-07-13 19:52:54,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:54,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:54,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:54,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:54,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:55,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_921 vanished before elimination [2021-07-13 19:52:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:52:55,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:55,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:55,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:55,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:55,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:55,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:55,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:52:55,160 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-13 19:52:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:55,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352287172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:55,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:55,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089570480] [2021-07-13 19:52:55,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:55,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:55,276 INFO L87 Difference]: Start difference. First operand 1026 states and 3566 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:55,921 INFO L93 Difference]: Finished difference Result 1510 states and 4883 transitions. [2021-07-13 19:52:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:52:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:55,924 INFO L225 Difference]: With dead ends: 1510 [2021-07-13 19:52:55,924 INFO L226 Difference]: Without dead ends: 1504 [2021-07-13 19:52:55,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-07-13 19:52:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1023. [2021-07-13 19:52:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.4784735812133074) internal successors, (3555), 1022 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3555 transitions. [2021-07-13 19:52:55,940 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3555 transitions. Word has length 22 [2021-07-13 19:52:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:55,940 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3555 transitions. [2021-07-13 19:52:55,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3555 transitions. [2021-07-13 19:52:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:55,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:55,941 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:56,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10153,787 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:56,142 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1718481548, now seen corresponding path program 759 times [2021-07-13 19:52:56,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:56,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930109644] [2021-07-13 19:52:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:56,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:56,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930109644] [2021-07-13 19:52:56,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930109644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727798733] [2021-07-13 19:52:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:56,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:56,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:56,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:56,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:56,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,728 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-07-13 19:52:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:56,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:56,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:56,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_930 vanished before elimination [2021-07-13 19:52:56,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:56,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:52:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:56,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727798733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:56,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:56,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763548973] [2021-07-13 19:52:56,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:56,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:56,872 INFO L87 Difference]: Start difference. First operand 1023 states and 3555 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:57,528 INFO L93 Difference]: Finished difference Result 1535 states and 4949 transitions. [2021-07-13 19:52:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:57,531 INFO L225 Difference]: With dead ends: 1535 [2021-07-13 19:52:57,531 INFO L226 Difference]: Without dead ends: 1535 [2021-07-13 19:52:57,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-13 19:52:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1019. [2021-07-13 19:52:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.4724950884086443) internal successors, (3535), 1018 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3535 transitions. [2021-07-13 19:52:57,547 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3535 transitions. Word has length 22 [2021-07-13 19:52:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:57,547 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3535 transitions. [2021-07-13 19:52:57,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3535 transitions. [2021-07-13 19:52:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:57,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:57,549 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:57,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10171,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,749 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1739218076, now seen corresponding path program 760 times [2021-07-13 19:52:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995568279] [2021-07-13 19:52:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995568279] [2021-07-13 19:52:57,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995568279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496781489] [2021-07-13 19:52:57,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:58,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:52:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:52:58,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:58,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,266 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-07-13 19:52:58,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_934 vanished before elimination [2021-07-13 19:52:58,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-07-13 19:52:58,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:58,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:52:58,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,317 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-07-13 19:52:58,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:58,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-13 19:52:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:58,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496781489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 19:52:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4208898] [2021-07-13 19:52:58,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:58,422 INFO L87 Difference]: Start difference. First operand 1019 states and 3535 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 19:52:58,643 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-07-13 19:52:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:52:58,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10192,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:58,844 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:52:58,846 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:52:58,847 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:52:58,847 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:52:58 BasicIcfg [2021-07-13 19:52:58,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:52:58,848 INFO L168 Benchmark]: Toolchain (without parser) took 863519.52 ms. Allocated memory was 188.7 MB in the beginning and 376.4 MB in the end (delta: 187.7 MB). Free memory was 169.4 MB in the beginning and 256.2 MB in the end (delta: -86.9 MB). Peak memory consumption was 101.6 MB. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.87 ms. Allocated memory is still 188.7 MB. Free memory was 169.3 MB in the beginning and 167.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L168 Benchmark]: Boogie Preprocessor took 11.56 ms. Allocated memory is still 188.7 MB. Free memory was 167.8 MB in the beginning and 166.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L168 Benchmark]: RCFGBuilder took 408.42 ms. Allocated memory is still 188.7 MB. Free memory was 166.7 MB in the beginning and 172.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 35.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L168 Benchmark]: TraceAbstraction took 863066.37 ms. Allocated memory was 188.7 MB in the beginning and 376.4 MB in the end (delta: 187.7 MB). Free memory was 171.9 MB in the beginning and 256.2 MB in the end (delta: -84.4 MB). Peak memory consumption was 103.3 MB. Max. memory is 8.0 GB. [2021-07-13 19:52:58,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.87 ms. Allocated memory is still 188.7 MB. Free memory was 169.3 MB in the beginning and 167.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.56 ms. Allocated memory is still 188.7 MB. Free memory was 167.8 MB in the beginning and 166.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.42 ms. Allocated memory is still 188.7 MB. Free memory was 166.7 MB in the beginning and 172.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 35.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 863066.37 ms. Allocated memory was 188.7 MB in the beginning and 376.4 MB in the end (delta: 187.7 MB). Free memory was 171.9 MB in the beginning and 256.2 MB in the end (delta: -84.4 MB). Peak memory consumption was 103.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1019states) and FLOYD_HOARE automaton (currently 6 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 43ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 862981.6ms, OverallIterations: 789, TraceHistogramMax: 3, EmptinessCheckTime: 478.9ms, AutomataDifference: 385540.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41700 SDtfs, 80356 SDslu, 248656 SDs, 0 SdLazy, 288923 SolverSat, 6574 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118180.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28159 GetRequests, 13198 SyntacticMatches, 567 SemanticMatches, 14393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45513 ImplicationChecksByTransitivity, 376801.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1026occurred in iteration=786, InterpolantAutomatonStates: 8656, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4997.1ms AutomataMinimizationTime, 788 MinimizatonAttempts, 173341 StatesRemovedByMinimization, 787 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4215.9ms SsaConstructionTime, 9228.8ms SatisfiabilityAnalysisTime, 234689.6ms InterpolantComputationTime, 32165 NumberOfCodeBlocks, 32159 NumberOfCodeBlocksAsserted, 2307 NumberOfCheckSat, 30588 ConstructedInterpolants, 885 QuantifiedInterpolants, 298797 SizeOfPredicates, 7061 NumberOfNonLiveVariables, 74004 ConjunctsInSsa, 16903 ConjunctsInUnsatCore, 1577 InterpolantComputations, 3 PerfectInterpolantSequences, 2250/7764 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown